Hydraulic Fitting Types The Comprehensive Guide Topa

Hydraulic Fitting Types

The Comprehensive Guide to Hydraulic Fitting Types

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Comprehensive Guide

A comprehensive guide to hydraulic fitting types can help you learn more about threads such as JIC, BSP, SAE, JIS and NPT. This guide provides clear and practical advice to help you choose the right fitting for your hydraulic system. This guide all ensures that you have the knowledge you need to make informed decisions and maintain efficient, reliable operation.

JIC fitting introduction Topa

Chapter 1

What are JIC Hydraulic Fittings?

understanding BSP hydraulic fittings

Chapter 2

Understanding BSP Hydraulic Fittings

Metric hydraulic fittings:The comprehensive guide

Chapter 3

Metric Hydraulic Fittings: The Comprehensive Guide

What is ORS Hydraulic Fitting

Chapter 4

What is ORS Hydraulic Fitting?

What is DIN Hydraulic fitting Topa

Chapter 5

What is DIN Hydraulic Fitting?

what is an orb hydraulic fitting Topa

Chapter 6

What is An ORB Hydraulic Fitting

JIC vs AN What's the difference

Chapter 7

An vs JIC Hydraulic Fittings: What's the Difference

BSP vs NPT title Topa

Chapter 8

BSP and JIC Hydraulic Fittings

What Does SAE Stand for in Hydraulic Fittings Topa

Chapter 9

What Does SAE Stand for in Hydraulic Fittings?

Pipe Thread vs Straight Thread Hydraulic Fittings

Chapter 10

Pipe Thread vs Straight Thread Hydraulic Fittings


Chapter 11

JIC vs NPT Fittings: The Ultimate Guide


Chapter 12

SAE vs JIC Hydraulic Fitting: What's the Difference

BSP vs NPT title Topa

Chapter 13

BSP VS NPT Threads:What are the Differences?


Chapter 14

UNC vs UNF Fittings: What is the Difference?

Your Questions?

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What is DIN Hydraulic fitting Topa

What is DIN Hydraulic Fitting

What is DIN Hydraulic Fitting?

Table of Contents


Hydraulic systems are integral to modern machinery, and the role of DIN hydraulic fittings in these systems is crucial. These fittings, standardized by the German Institute for Standardization (Deutsches Institut für Normung), are not just components; they are the backbone of countless hydraulic applications, ensuring efficiency and safety. In this exploration, we will delve into the origins, types, and applications of DIN hydraulic fittings. Understanding their significance and versatility is key to leveraging their full potential in various industrial contexts.


The Origin and Meaning of DIN

The DIN standard originated from the German Institute for Standardization, known in German as “Deutsches Institut für Normung.” This organization established the DIN standard to facilitate consistency and standardization across various industrial components, including hydraulic fittings. This standard has been instrumental in unifying design specifications, dimensions, and quality benchmarks. The acronym DIN itself stands for “Deutsches Institut für Normung,” indicating its origin and primary purpose in standardizing products and components. The implementation of the DIN standard across industries is pivotal for ensuring interoperability, quality, and reliability of products, including hydraulic fittings, on a global scale.

Types of DIN Hydraulic Fittings

DIN hydraulic fittings represent a diverse spectrum of designs, each meticulously engineered to meet distinct application needs and pressure specifications. In the realm of hydraulic systems, these fittings are indispensable for establishing connections between hoses, tubes, and pipes. Their primary function is to secure these connections, ensuring they remain leak-free even under different pressure conditions which can vary widely depending on the application.


The design of DIN fittings is governed by rigorous standards, ensuring uniformity in size, shape, and function. This uniformity is crucial in maintaining the integrity and efficiency of hydraulic systems. Different types of DIN fittings are optimized for specific situations – for instance, some are better suited for high-pressure environments, while others are designed for systems where vibration or rotational forces are a concern.


Each fitting type under the DIN standard is characterized by its unique connection mechanism and sealing technique. These mechanisms are designed to provide maximum sealing efficiency, minimize the risk of leakage, and maintain structural integrity under pressure. For example, some DIN fittings employ a cutting ring design that bites into the tube to form a secure seal, ideal for high-pressure applications. Others might use an O-ring seal or a flared connection, depending on the specific requirements of the system.

Types of DIN Hydraulic fittings

DIN 2353 Tube Fittings

Characterized by their cutting ring design, DIN 2353 tube fittings are widely utilized in high-pressure hydraulic systems. The cutting ring acts as a biting mechanism, creating a secure and leak-proof connection when tightened onto a tube. This unique feature enables them to handle high-pressure conditions effectively, making them a popular choice for robust hydraulic applications.

24° Cone Fittings

These fittings are distinguished by their 24-degree cone, commonly employed with metric tubes. The cone angle is specifically designed to offer a tight and efficient seal, which is critical in medium to high-pressure systems. The 24° cone fittings’ design ensures reliable performance in a range of hydraulic applications, providing a solid connection that can withstand significant pressure variations.

Flare DIN Fittings 

Similar to 24° cone fittings, DIN flare fittings are designed for use in high-pressure applications. They typically feature a flared tube end, which mates with a corresponding tapered seat in the fitting body. This flaring allows for a larger contact area, enhancing the strength and reliability of the connection.

DIN Banjo Fittings

These fittings are recognized for their distinct banjo-shaped body, allowing for a compact and efficient hose connection. DIN banjo fittings are especially useful in tight spaces where traditional fittings may not fit. They provide a secure, leak-proof connection, making them suitable for moderate pressure applications.

DIN Screw-in Fittings

 Designed for ease of installation, these fittings feature a screw-in mechanism that allows for quick and simple assembly. DIN screw-in fittings are versatile and can be used in a variety of hydraulic systems, offering a reliable connection that is both easy to install and maintain.

Swivel DIN Fittings

These fittings are designed for applications where rotational or oscillating movements are present. The swivel feature allows for free movement of the connected hose or tube, reducing stress and preventing kinking or twisting. DIN swivel fittings are ideal for dynamic hydraulic systems where movement flexibility is crucial.



DIN Fittings: These fittings generally adhere to a metric design specification. A common feature in DIN fittings is the 24° cone used for sealing purposes. This design is tailored to ensure a tight and effective seal, particularly suited for high-pressure environments.

SAE Fittings: In contrast, SAE (Society of Automotive Engineers) fittings frequently employ a 37° flared or an O-ring face seal design. The 37° flared design provides a robust seal and is often used in applications where high pressure is a factor. The O-ring face seal offers a high degree of leak resistance and is suitable for a variety of hydraulic applications.

Regional Preferences

The preference for either DIN or SAE standards is largely influenced by regional manufacturing and engineering practices. In Europe and Asia, DIN standards are more prevalent due to their alignment with the metric system and regional engineering norms. These regions have a long-standing tradition of using DIN standards, which are deeply integrated into their industrial and manufacturing sectors.

Conversely, North American industries show a strong preference for SAE standards. This preference is rooted in the historical development of engineering practices in the region, where the Imperial system and SAE standards have been the norm.

Are DIN fittings Metric?

Yes, DIN fittings are indeed metric. This is a fundamental aspect of their design and specification. The adherence to the metric system is a key distinguishing feature of DIN (Deutsches Institut für Normung) fittings. The metric system, which uses units such as millimeters (mm) for length and dimensions, and the Pascal (Pa) or bar for pressure measurements, is the basis for all dimensions, threads, and specifications of DIN fittings.

Materials of DIN Fittings

DIN hydraulic fittings are predominantly made from two types of materials: stainless steel and carbon steel. Each material is chosen based on specific application requirements.

Stainless Steel: Stainless steel is highly favored for its corrosion resistance, making it ideal for hydraulic systems exposed to corrosive environments or those handling corrosive fluids. It maintains its integrity even under harsh conditions, ensuring longevity and reliability. Stainless steel fittings are often used in food processing, marine applications, and chemical industries.

Carbon Steel: Carbon steel is commonly used due to its high strength and durability. It is suitable for high-pressure applications and where robustness is a primary concern. Carbon steel fittings are cost-effective and widely used in general industrial, automotive, and construction applications. However, they are more susceptible to corrosion compared to stainless steel and may require protective coatings or treatments for certain applications.


Advantages of Using DIN Hydraulic Fittings

Comparative Analysis

DIN hydraulic fittings offer several advantages over other types of fittings, making them a preferred choice in many hydraulic applications.

Superior Reliability: DIN fittings are known for their exceptional reliability. Their design and manufacturing standards ensure a consistent and dependable performance, which is crucial in hydraulic systems where failures can be costly and dangerous.

Enhanced Durability: The materials used in DIN fittings, typically stainless and carbon steel, provide robustness and longevity. These materials are chosen for their ability to withstand harsh conditions, including high pressures, extreme temperatures, and corrosive environments.

High Efficiency: The precision engineering of DIN fittings contributes to their efficiency. They ensure a tight and secure connection, minimizing the risk of leaks, which is essential for maintaining the efficiency of hydraulic systems.

Unique Benefits

DIN hydraulic fittings also offer unique benefits that add value to their application in various systems.

Leak-Proof Designs: One of the most significant advantages of DIN fittings is their leak-proof design. The precision with which these fittings are made ensures that connections are secure, reducing the likelihood of leaks, which can lead to system inefficiencies and safety hazards.

Ease of Maintenance: DIN fittings are designed for ease of assembly and disassembly, making maintenance tasks simpler and more efficient. Their standardized dimensions also mean that replacement parts are easier to source and fit.

Versatility: DIN fittings are versatile in their application. They are suitable for a wide range of pressures and temperatures, and their standardized design makes them compatible with a variety of hydraulic systems and components. This versatility makes them an ideal choice for a broad spectrum of industries, including automotive, manufacturing, aerospace, and more.

How to Choose the Right DIN Fittings

When selecting the right DIN hydraulic fittings for a particular system, several key factors must be considered to ensure optimal performance and compatibility. Here are guidelines and factors to consider:


Size Selection: The size of the fitting is critical. It must match the size of the hoses, tubes, or pipes in the hydraulic system. Using fittings of the incorrect size can lead to leaks or system failures. Refer to the system’s specifications or consult with a hydraulic expert to determine the appropriate size.

Pressure Rating: Each fitting has a maximum pressure rating. Choose a fitting whose pressure rating meets or exceeds the maximum operating pressure of your hydraulic system. Using a fitting with a lower pressure rating than required can result in fitting failure under high-pressure conditions.

Material Selection: Consider the material of the fitting based on the application. Stainless steel fittings offer corrosion resistance and are suitable for harsh environments, while carbon steel fittings are appropriate for less demanding conditions. The material should be chosen based on the operational environment and the fluid type used in the system.

Factors to Consider

Compatibility with Existing Systems: Ensure that the DIN fittings are compatible with the existing components in your hydraulic system. This includes not only size and thread type but also material compatibility, especially if you are integrating the fitting into an existing system.

Environmental Conditions: Consider the environment in which the system will operate. Temperature extremes, exposure to corrosive substances, and the presence of vibrations or shocks can impact the suitability of certain fittings.

Fluid Compatibility: The hydraulic fluid used in the system must be compatible with the material of the fittings. Some fluids can cause corrosion or degradation of certain materials. Ensure that the material of the fitting is compatible with the type of hydraulic fluid used.

Application-Specific Requirements: Depending on the application, there might be additional requirements to consider, such as the need for fittings with a specific certification or those designed for use in food-grade applications or explosive environments.

Installation and Measurement Tips

Installing DIN hydraulic fittings correctly is crucial for the safety and functionality of the hydraulic system. Here’s a step-by-step guide and measurement tips:

installing DIN Hydraulic fitting Topa

Step-by-Step Guide for Installation

Preparation: Ensure that the tube or hose ends are clean, free from debris, and cut squarely. Any burrs should be removed to prevent damage to the fitting and sealing surfaces.

Inspection: Before installation, inspect the fittings for any damage or imperfections. Check the threads and sealing surfaces for cleanliness and integrity.

Lubrication: Lightly lubricate the threads and any moving parts of the fitting, such as the nut or cutting ring. Use a lubricant that is compatible with the system’s hydraulic fluid.

Assembly: For threaded fittings, start by hand-threading to avoid cross-threading. Once hand-tight, use the appropriate tools to tighten the fitting to the manufacturer’s specifications. For compression-type fittings (like DIN 2353), insert the tube into the fitting, ensuring it is seated properly, then tighten the nut by hand until resistance is felt.

Final Tightening: Use two wrenches to tighten the fitting – one to hold the fitting body and the other to turn the nut. Tighten to the manufacturer’s recommended torque setting, usually provided in their specifications or installation guide.

Inspection: After installation, inspect the assembly to ensure it is secure and properly aligned. There should be no gaps between the fitting components.

Measurement Tips

Determining Size: To replace or install new fittings, you need to know the correct size. Measure the outer diameter of the tube or hose for tube fittings. For thread size, measure the diameter of the male thread or the inside diameter of the female thread.

Thread Identification: If the fitting is threaded, identify the thread type (metric, BSP, etc.). Use a thread gauge or compare with a known thread type to ensure compatibility.

Length Measurement: When measuring the length of a hose assembly, include the fitting end connections. Measure from the end of one fitting to the end of the other.

Angle and Orientation: For fittings like elbows or tees, note the orientation of the fitting ends. Accurate measurement of angles ensures that the new fitting will align correctly in the system.


In conclusion, understanding and implementing the correct use of DIN hydraulic fittings is essential for the efficiency, safety, and reliability of hydraulic systems. From the historical origins of the DIN standard to the intricate details of fitting types, materials, and manufacturing processes, each aspect plays a vital role in ensuring optimal system performance. Understanding these nuances not only ensures the functional integrity of hydraulic systems but also enhances their safety and effectiveness in demanding environments.

Metric hydraulic fittings:The comprehensive guide

What are Metric Hydraulic Fittings

Metric Hydraulic Fittings: The Comprehensive Guide

Navigating the complex landscape of hydraulic fittings can be overwhelming. Yet, when it comes to repairs and upgrades, every detail matters, especially thread type and international standards. From ISO guidelines that assure quality to the advantages of using metric threads, understanding these elements can significantly impact the efficiency and longevity of your hydraulic systems. This guide will delve into the intricacies, from materials and manufacturing standards to applications and buying options. All aimed to empower you to make informed decisions for your specific hydraulic needs.

Table of Contents

Basic of Metric Fittings

In the world of hydraulics, metric hydraulic fittings are critical accessories that connect components to ensure the smooth and efficient flow of fluids. They keep hoses, pipes, and tubing securely connected, minimizing leaks and improving performance.

Metric Hydraulic Fitting Types

Metric threads in hydraulic fittings have been standardized to ensure optimal performance, efficiency, and safety in hydraulic systems. Below are some of the most common metric thread types found in hydraulic fittings:

● Metric Parallel Thread (M Thread): This is the standard metric thread type with a constant diameter throughout the threaded portion. This thread is ideal for low-pressure applications, is simple to manufacture, and is widely available.

● Metric Tapered Threads: Tapered threads are conical in shape and are ideal for high-pressure applications. They provide excellent sealing capability and eliminate the need for secondary sealing methods such as O-rings.

Metric O-Ring Face Seal (ORFS): These fittings have a flat face with an O-ring on the end to enhance sealing. ORFS fittings are known for their high-pressure capability and zero-leakage performance.

● Flareless Threads (DIN 2353): These metric threads have a metal-to-metal bite for effective pipe sealing and are excellent in medium to high-pressure applications.

● Komatsu Metric Threads: These are metric threads specific to Komatsu machinery and differ slightly from standard metric threads.

● Japanese Industrial Standard (JIS): Although they are not technically metric threads, they are similar in many ways and are often used with standard metric fittings in machinery. They are primarily used in Japanese-made equipment.

● Metric 24 Degree Tapered (DIN 3901/3902): These fittings are commonly used in European hydraulic systems to provide a reliable high-pressure connection.

International Standards

DIN Standards

When it comes to metric hydraulic fittings, DIN (Deutsche Institut für Normung) standards are a key factor. These German-originated standards provide a clear roadmap for quality and compatibility. They cover aspects such as dimensions, material types, and performance benchmarks. As a leading manufacturer, we always adhere to these guidelines to ensure that you get reliable, efficient products. For example, the DIN 2353 standard focuses on flareless bite fittings, which are critical for high-pressure systems. In short, if a product is DIN certified, it is a sign of quality and international recognition.

ISO Standards

Understanding ISO standards may seem complicated, but they are essential guidelines to ensure that hydraulic fittings are consistent, durable, and compatible. When it comes to metric fittings, there are several ISO standards that come into play. We’ll break them down below.


♦ ISO 6149: This standard specializes in metric o-ring face seals, which ensure high-pressure capability and reliable sealing. ISO 9974: This standard covers metric ports and stud ends. It is critical to ensure proper fit and high performance.

♦ ISO 8434: This is another standard for metric fittings related to 24-degree taper fittings. It is a standard commonly used in European hydraulic systems.

♦ ISO 12151: This standard focuses on hose fittings with ISO 8434-1 and ISO 8434-4 24° taper fitting ends. It ensures that the hose fits correctly with other components in the hydraulic system.

♦ ISO 16028: This standard deals with quick-connect couplings, which are essential for the rapid assembly and disassembly of hydraulic lines.

The Advantages of Metric Threads

When it comes to hydraulic fittings, it’s the details that make the difference. Metric threads are one such detail that brings a host of advantages. Let’s explain why it’s important to focus on metric threads, especially when it comes to repairs or upgrades.

◆ High compatibility in international markets

First, let’s talk about compatibility. Metric threads are like the “universal remote control” of the hydraulic world, working in almost any environment. This standardization is crucial if you operate in the international market or use machines from different countries. Need to replace a fitting? With metric threads, you’re less likely to run into compatibility issues, making repairs a breeze.

◆ Better sealing capabilities

The next consideration is sealing. The strength of a hydraulic system depends on its weakest seal. Metric threads typically have better sealing compared to other thread types. Better sealing means fewer leaks, which in turn means less downtime and fewer maintenance items.

◆ Efficiency of hydraulic systems

At the end of the day, efficiency matters, especially in hydraulic systems where pressure and flow are king. Metric threads handle these pressures efficiently. This reduces wear and tear on the system and extends the life of the machine. In short, choosing metric threaded fittings can make your hydraulic system more efficient and economical in the long run.

The Importance of Quality

Material Selection:

Steel: Known for its high strength and durability, steel is often the material of choice for high-pressure applications. However, it is prone to rust and therefore may not be ideal for corrosive environments.

Brass: This material offers excellent corrosion resistance and is easier to work with than steel. However, it is not well suited for high-pressure, high-temperature environments.

Stainless Steel: Stainless steel is a “best of both worlds” material, offering high strength and excellent corrosion resistance, but at a higher cost.

Comparison of Durability, Applications, and Cost

Durability: Stainless steel wins. But if rust isn’t an issue, regular steel will serve your needs just fine.

Applications: Steel is great for industrial and heavy machinery. Brass is good for less demanding applications such as plumbing or low-pressure hydraulic systems. Stainless steel is the best choice for corrosive or sanitary environments.

Cost: In general, steel is the most affordable, followed by brass. Stainless steel costs more, but remember, you get what you pay for. If you need to use fittings in more demanding environments, be sure to choose the finest material available.

Manufacturing Standards.

Adhering to recognized manufacturing standards is like buying insurance; it’s a safeguard against defects and ensures reliability. Whether it’s ISO standards or other well-known standards, these guidelines are a symbol of quality. They ensure that the parts you buy will do the job, and do it well.

Simple Thread



Basic Major

Basic Minor






















































































Metric Hydraulic Fittings Size Chart


Okay, so you’ve learned about the types, benefits, and quality considerations of metric hydraulic fittings. Now, let’s get down to business: Where do these metric fittings work best?


First up, industrial applications. Factories and manufacturing plants often use hydraulic systems for heavy lifting and precision movement. In this regard, the strength and durability of quality metric fittings is critical. If a fitting is not selected correctly, it can lead to inefficiencies in production or even mechanical failure, causing even more damage.


From power steering to braking systems, metric fittings ensure seamless operation. If you are an automotive mechanic, then quality metric fittings are essential.

Mining, Agriculture

Specialized applications in mining and agriculture. Here, your equipment is often exposed to harsh conditions such as mud, dust and even corrosive chemicals. A quality metric fitting can reduce the risk of equipment failure.

Metric vs Imperial vs American threads

Choosing the correct thread type for a hydraulic system can sometimes be like navigating a maze. Let’s clear up the maze by analyzing the differences and applications of metric, fractional and American threads.

Metric v American Threads

Size: Metric threads have thread pitches measured in millimeters, while American threads are measured in inches. This means that metric threads offer finer adjustments, especially for high-precision applications.

Compatibility: Metric threads are recognized worldwide, making them a more versatile choice. American threads, while popular in the United States, may require an adapter for use in international environments.

Applications: Generally, US threads can be found in older equipment and in US infrastructure. However, metric threads dominate automotive and industrial applications worldwide.

Metric vs Imperial Threads

Difference: Inch threads typically use the Whitworth thread form, which is characterized by a 55-degree thread angle. Metric threads typically have a thread angle of 60 degrees. This affects sealing and strength, so they are not interchangeable.

Advantages and disadvantages: Inch threads are strong but uncommon and therefore difficult to source. Metric threads are universally recognized, easier to find, and have advantages in terms of availability and cost.

Usage: Imperial threads are common in the UK and Commonwealth countries. Metric threads are more commonly used, especially in Europe and Asia.

Choosing the Right Metric Pipe Fittings

Choosing the right metric fittings is no easy task; it’s not just about compatibility, it’s about quality, safety, and efficiency. So let’s talk next about how to choose the right metric fittings for your specific needs.

Specifications and Measurements

Know the Diameter: The first thing you need to know is the diameter of the hose or pipe. This ensures that the fit you choose is not too loose or too tight.

Length: Especially in narrow or complex systems, the length of the fitting can have a significant impact on ease of installation and operation.

Check the threads: Make sure the thread type matches your application. If you are unsure, use a thread gauge.

Pressure Ratings

Understanding Pressure Ratings: Every fitting has a certain pressure rating range. Exceeding these ranges can lead to failure, or worse, an accident.

Match the system: Make sure the coupling you choose can withstand the pressure of the hydraulic system you are using. If in doubt, choose a fitting with a higher rating to ensure a margin of safety.


Metric male ORFS (Heavy)

Metric male ORFS Adjustable End (Heavy)

Metric male ORFS (Light)

Metric male ORFS Adjustable End (Light)

E Type


E Type




























































































Thread type and sealing

Thread Compatibility: Mismatched threads can lead to leaks or even catastrophic failure.

Sealing solutions: In addition to the thread, consider the type of seal – o-ring, cone or metal-to-metal. Your application may require one type and not the other.

Practical selection steps

Check Inventory: Before you buy, see what you have on hand. This avoids duplicate purchases and helps determine what is actually needed.

Quality Assurance: This should come as no surprise, but make sure the accessories meet industry standards. Poor-quality fittings will cost you more in the long run.

Test run: After installation, always perform a pressure test to ensure that there are no leaks and that the fitting is performing to its specifications.


The world of hydraulic fittings is full of choices. While ISO standards set the benchmark for quality, thread type – Metric or American threads – can also make a significant difference in performance and compatibility. Knowing which material is best suited for your application and how to choose based on durability and cost informs your decision. With suppliers like Topa Hydraulics, you can enjoy the convenience of one-stop shopping, quality assurance and competitive pricing. Armed with this knowledge, you’re not just buying a product, you’re buying efficiency, reliability and peace of mind.

Why Topa

Finally, let’s talk about where to buy these metric fittings and how to make the best buying decision. Choosing to buy from a reputable supplier such as Topa ensures that you get a high quality product that meets your needs.

One-stop shopping: At Topa, we offer a wide range of hydraulic products and components. No need to jump around from supplier to supplier or worry about compatibility issues. Our products are compatible with Parker, Eaton, and gates products.

Competitive Pricing: Everyone loves a good deal, but what if you could get a quality product at an affordable price? That’s exactly what we offer. Our factory offers the best value for money, saving you money.

Quality assurance: Our products meet strict manufacturing standards, ensuring that your investment is built to last.

Expert Support: Have operational and detail questions? We have the answers. Our experienced professionals are standing by to guide you through the selection and purchasing process.

Metric fitting guide manufacturer China Workshop

Determine your needs: First, make a note of the specifications and quantities you need, as discussed earlier in this guide.

Visit the website: Visit our page. Use the search and filtering options to find the accessories you need.

Send Inquiry: You can contact us on Contact Us page or use WhatsApp to send your requirement and our salesperson will reply you.

By choosing a streamlined process, you’re not just buying a product, you’re buying a worry-free experience, quality assurance and unrivaled customer service. That’s the Topa promise, and we’ll honor every one of our commitments.

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Flexible Metal Hose Assembly

Flexible Metal Hose Assembly

Topa supplies all kinds of flexible metal hose assemblies, our thread end flexible metal hose has NPT, BSP, JIC, and Metric thread. Those thread end corrugated metal hoses are flexible metal hoses, that can be applied in vacuum, water, chemical, and food applications. We promise to supply high-quality flexible metal hoses.

If you have any questions about thread end flexible metal hoses, please contact us!

Flexible Metal Hose Assembly Video

This video is about the details of Topa thread end flexible metal hose assembly.

Topa can provide all sizes, materials, lengths, and threads. We will follow the production process strictly and produce each batch of products carefully, and we will carry out a full set of quality control for the products, welcome you to order.

If you have any questions of thread end flexible metal hoses,  please contact us.

Flexible Metal Hose Catalog

This catalog is about flexible metal hoses.

Topa can offer all kinds of hydraulic flexible metal hoses, and our catalog also including all of them.

Please contact us If you need more information on corrugated metal hoses or would like some free samples.

flexible metal hose catalog Topa
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Metric Interlock Fitting

Metric Interlock Fitting

Metric interlock fitting has 24° cone o-ring fitting, 74° cone fitting and flat face fitting. All of those fittings include Heavy and Light type. Topa can provises all types of Metric interlock hose fitting, such as straight interlock fitting, 45-degree interlock fitting, and 90-degree interlock fitting.

If you have any questions of interlock Metric hose fittings, please contact us!

10513 interlock metric fitting Topa

10513 metric interlock fitting

20513 interlock metric fitting Topa

20513 metric interlock fitting

20543 interlock metric fitting Topa

20543 metric interlock fitting

20593 interlock metric fitting Topa

20593 metric interlock fitting

Metric Interlock Fitting Video

This video is about the details of Topa Metric interlock fitting.

Interlock Metric fittings are made of high-quality carbon steel, and stainless steel. Those fittings can be applied in high-pressure hydraulic systems.

Please contact with us if you have any questions about hydraulic Metric hose tail fitting or other products.

Interlock Hose Fitting Catalog

This catalog is about interlock hose fittings.

Topa can offer all kind of hydraulic interlock hose fittings, and our catalog also including all of them.

Please contact us If you need more information of hydraulic hose fittings, or would like some free samples.

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Interlock Hose Fittings

Interlock Hose Fittings Factory in China

                     ※ High-temperature resistance

                     ※ High-pressure resistance

                     ※ Corrosion-resistance

                     ※ Durable

Interlock Hose Fittings Manufacturer in China

Interlock hose fittings provide a safe and leak-free connection between hose and machinery in high pressure environments. Topa’s interlock hose fittings are in strict compliance with international standards and are available upon request!

Interlock Hose Fittings Product List

Topa offers a full range of internlock fittings, including metric interlock fittings, BSP interlock fittings, NPT interlock fittings, JIC interlock fittings, flange interlock fittings, and JIS interlock fittings. Our fittings can meet all your needs, please contact us for more information!

BSP interlock hose fitting

BSP thread interlock fitting, straight/45-degree/90-degree.

JIC interlock hose fitting

JIC thread interlock fitting, straight/45-degree/90-degree.

NPT interlock hose fitting

NPT thread interlock fitting, for use with hydraulic hoses.

Metric interlock hose fitting

Metric thread interlock fitting, straight/45-degree/90-degree.

Flange interlock fitting

Code 61/62, 9000psi interlock fitting, straight/45-degree/90-degree.

Interlock hose ferrule

Interloc hose ferrule, for use with interlock hose fittings.

Interlock double connector

Double connector interlock hose fitting is usually used to connect two hoses.

Interlock Hose Fittings Video

This video is about tube cutting, cold bending, packaging, and other steps of hydraulic tube assemblies. You can click this video to check more details. If you want to know more information, please contact us.

Topa hydraulic fittings

Topa, as the best manufacturer of hydraulic fittings, has perfect production, quality inspection, and packaging processes to meet all customers’ needs. And Topa can also provide custom hydraulic fittings, welcome to order.

Your Reliable Interlock Hose Fittings Manufacturer

Interlock fittings are used in conjunction with multi-layered wire hydraulic hoses for use in high-pressure hydraulic environments, and Topa’s interlock fittings include a variety of threads and models to meet all your needs.

Interlock fittings are available in stainless steel, carbon steel and steel, depending on the environment in which they are used. However, the quality of all of our fittings is up to standard and you can order with confidence.

Advantages of Topa interlock fittings:

  • Durable
  • High pressure resistance
  • High quality
  • Affordable price
interlock fittings manufacturer process

Why choose us

As a manufacturer of hydraulic fittings, Topa can supply high quality hydraulic fittings to all customers. We have a wide range of fittings, including brake fittings, hose fittings, brass fittings, and adapters. These hydraulic fittings are available in both quality and quantity to meet your needs.

Topa can provide excellent customer service. From the moment you start asking for a quote, our staff will provide the highest quality service. You can ask all your doubts and our salesmen will propose a solution in the shortest possible time.

Topa factory performs quality tests on all fittings. We test the hardness, corrosion resistance, pressure resistance, and appearance of the fittings. We have professional testing equipments and will test them according to international standards. If you need a test report, you can contact our staff.

Topa can provide custom services. If you need a special customized fitting, you can provide detailed drawings and parameters, and our professional technicians will arrange production for you.


Interlock Hose Fittings Application

Interlock fittings can be used in high pressure hydraulic systems, where the end is divided into two areas: one for locking and the other for sealing. This type of fitting is popular because it ensures the smoothness and tightness of the hydraulic system. They are used in applications such as mining, plant, oil and gas, and aerospace.

oil and gas interlock fittings

Oil and gas

Hydraulic interlock hose fitting are resistant to high pressure and high temperature and are not easily corroded by fluids after special treatment.

industry interlock fittings Topa


Interlock hose fittings can be used in fixed or narrow positions in major hydraulic applications in factories. They can provide a leak free seal.

oil and gas interlock fittings


Mining application needs high-pressure resistance and durale interlock fittings, and Topa can offer all kinds of interlock hose fittings.

Quality Control​


What is an interlock fitting?

An interlock fitting is a special type of hose fitting.

Why do I need an interlock fitting?

Interlock fittings can be used in high pressure environments without leaks.

What kind of hoses can be used with interlock fittings?

4SH and SAE 100R13 multi-layer steel wire braided hoses.

What are the advantages of interlock fittings?


Interlock fittings can withstand high pressure, are resistant to wear and tear, and have a strong seal.

What materials are interlock fittings available in?

Carbon steel, stainless steel and steel.

What applications require the use of interlock fittings?

All applications where multiple layers of steel braided hose are used.

What threads are available for interlock fittings?

NPT, BSP, JIC, and JIS threads.

Can we customize interlock fittings?

Yes, please provide detailed parameters.

Do you have interlock fittings in stock?

No, but we will arrange production as soon as possible.

How long does it take to make an interlock connector?

Normally, 30-45 days.

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Compression Fittings

Hydraulic Compression Fittings

The compression mechanism of a hydraulic compression fitting typically includes a nut, a ferrule or sleeve, and a fitting body. Furthermore, hydraulic compression fittings come in various types, including tees, elbows, couplings, adapters, and valves, each with its specific function.

If you’re looking for hydraulic compression fittings in different sizes or materials, Topa can provide you with a wide range of options to meet your specific requirements.

Hydraulic Compression Fittings Video

This video shows the details of hydraulic compression fittings.

Hydraulic compression fittings are used in hydraulic systems to transport liquids and gases under high pressure. Including mining, agriculture, aerospace, and manufacturing.

Contact us for more information!

Hydraulic Compression Fitting Catalog

Topa can offer a full range of compression hydraulic fittings, including tees, elbows, couplings, adapters, valves, etc.
We also offer samples and custom services.
Contact us for more information!

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Hydraulic Caps

Hydraulic Caps

Hydraulic caps are another type of fitting used in hydraulic systems. They are used to cover the end of a hydraulic line or fitting, protecting it from contamination and preventing leaks.

Topa can provide large sizes and materials of hydraulic line caps. Please contact us if you need more information on hydraulic caps

Hydraulic Caps Video

This video shows the details of the hydraulic cap adapter.

Hydraulic caps are commonly used to protect hydraulic lines and fittings during transportation and storage. They can be used in a variety of hydraulic systems, such as mobile, construction equipment, and manufacturing equipment.

If you have any questions about hydraulic hose caps and plugs or other products, please contact us.

Hydraulic Plugs and Caps Catalog

Topa offers various types of hydraulic plug and tee fittings, and this catalog includes all of them.

Please contact us if you need more information on plug and tee fittings or would like some free samples.

Topa hydraulic plug catalog
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Hydraulic Plug

Hydraulic Plug Adapter

Hydraulic plugs are used to block the flow of fluid in a hydraulic system. Hydraulic plugs come in a range of sizes to fit different hydraulic systems. The size of the plug needed will depend on the diameter of the hydraulic line or fitting it is being used with.

Topa can provide large sizes and materials of hydraulic line plugs. Please contact us if you need more information on the hydraulic plug.

Hydraulic Plug Adapter Video

This video shows the details of the hydraulic plug adapter.

Typically, hydraulic plugs are used to stop the flow of fluid in hydraulic systems. And Topa can offer all sizes of them.

Contact us now!

Hydraulic Plugs and Caps Catalog

Topa offers various types of hydraulic plug and tee fittings, and this catalog includes all of them.

Please contact us if you need more information on plug and tee fittings or would like some free samples.

Topa hydraulic plug catalog
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Hydraulic Tee

Male to Female Hydraulic Tee Fitting

A male to female tee fitting is a type of plumbing or hydraulic fitting used to connect three pipes or hoses together in a T-shaped configuration, with male and female thread in the end.

Topa can offer different sizes and dimensions of male to female hydraulic tee fittings, and we also supply free samples and customized services.

Male to Female Hydraulic Tee Fitting Video

This video shows the details of male to female hydraulic tee.

Tee fittings are commonly made of stainless steel, brass, or carbon steel. They are used in a wide range of hydraulic applications, such as in agriculture heavy machines, construction, and industry.

If you have any questions about hydraulic hose tee fittings or other products, please contact us.

Hydraulic Tee Fitting Catalog

Topa offers various types of tee fittings, and this catalog includes all of them.

Please contact us if you need more information on tee fittings or would like some free samples.

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