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Sophie Yu
Sophie Yu
Sophie Yu works as a customer support specialist at JIERUI FLUID, ensuring seamless communication between the company and its global clientele. Her focus is on delivering exceptional service and building long-term partnerships.

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What is a metric hose fitting?

Jan 05, 2026

A metric hose fitting is a crucial component in various hydraulic and fluid transfer systems. As a supplier of metric hose fittings, I've witnessed firsthand the importance of these small yet significant parts. In this blog post, I'll delve into what metric hose fittings are, their types, applications, and why choosing the right ones matters.

What is a Metric Hose Fitting?

At its core, a metric hose fitting is a device used to connect hoses, pipes, or tubing in a hydraulic or fluid - handling system. The term "metric" refers to the measurement system used for its dimensions. Unlike the imperial system, which is prevalent in the United States, the metric system uses millimeters for sizing, offering a more standardized and internationally recognized approach.

Metric hose fittings are designed to provide a secure and leak - free connection between different components of a fluid system. They must withstand the internal pressure of the fluid flowing through them, as well as external factors such as vibration, temperature changes, and mechanical stress.

Types of Metric Hose Fittings

There are several types of metric hose fittings, each with its own unique design and application.

Metric Female Flat Seat

The Metric Female Flat Seat is a common type of metric hose fitting. It features a flat sealing surface, which provides a tight seal against a mating flat surface. These fittings are often used in systems where a low - pressure to moderate - pressure seal is required. They are easy to install and are suitable for a wide range of fluids, including water, oil, and hydraulic fluids.

45° Metric Female 24° Cone Seat

The 45° Metric Female 24° Cone Seat is designed for high - pressure applications. The 24° cone seat angle provides a reliable metal - to - metal seal, which can withstand the high pressures commonly found in hydraulic systems. The 45° angle allows for more flexibility in the installation orientation, making it easier to connect hoses in tight spaces.

Metric Male 24° Cone Seat

Metric Male 24° Cone Seat fittings are the counterpart to the 45° Metric Female 24° Cone Seat fittings. They have a male 24° cone that mates with the female cone seat to create a high - pressure seal. These fittings are often used in high - pressure hydraulic systems, such as construction equipment, agricultural machinery, and industrial manufacturing processes.

Applications of Metric Hose Fittings

Metric hose fittings are used in a wide variety of industries and applications.

Hydraulic Systems

In hydraulic systems, metric hose fittings are essential for transferring hydraulic fluid between the pump, valves, cylinders, and other components. They ensure that the hydraulic system operates smoothly and efficiently, without any leaks. Hydraulic systems are used in many industries, including construction, manufacturing, and transportation. For example, in construction equipment like excavators and bulldozers, metric hose fittings are used to connect the hydraulic cylinders that control the movement of the machine's arms and buckets.

Pneumatic Systems

In pneumatic systems, which use compressed air to power machinery and equipment, metric hose fittings are used to connect the air hoses to the valves, actuators, and other components. They provide a reliable and leak - free connection, ensuring that the pneumatic system operates at optimal performance. Pneumatic systems are commonly used in manufacturing plants for tasks such as material handling, assembly, and packaging.

Automotive Industry

The automotive industry also relies on metric hose fittings for various applications. They are used in the engine cooling system to connect the radiator hoses, in the fuel system to connect the fuel lines, and in the power steering system to connect the hydraulic hoses. Metric hose fittings in automotive applications must be able to withstand the harsh environmental conditions under the hood, including high temperatures, vibrations, and exposure to chemicals.

Marine Industry

In the marine industry, metric hose fittings are used in a variety of shipboard systems, including the hydraulic steering system, bilge pumping system, and fuel delivery system. They must be able to withstand the corrosive effects of saltwater and the harsh marine environment. High - quality metric hose fittings are essential for ensuring the safety and reliability of marine vessels.

Why Choose the Right Metric Hose Fittings?

Choosing the right metric hose fittings is crucial for the proper functioning and safety of a fluid system.

Compatibility

The fittings must be compatible with the hoses, pipes, and other components in the system. This includes ensuring that the size, thread type, and material of the fitting match those of the other components. Using incompatible fittings can lead to leaks, which can cause system failures, damage to equipment, and even safety hazards.

Pressure Rating

The pressure rating of the fitting must be suitable for the operating pressure of the system. Using a fitting with a lower pressure rating than the system requires can result in the fitting failing under pressure, leading to leaks or even catastrophic failure. On the other hand, using a fitting with a much higher pressure rating than necessary can be more expensive and may not be the most efficient choice.

Material

The material of the fitting is also important. Different materials have different properties, such as corrosion resistance, strength, and temperature tolerance. For example, in a system that handles corrosive fluids, a fitting made of stainless steel or brass may be more appropriate than one made of carbon steel. In high - temperature applications, a fitting made of a heat - resistant material may be required.

As a Supplier of Metric Hose Fittings

As a supplier, I understand the importance of providing high - quality metric hose fittings. We offer a wide range of fittings, including the Metric Female Flat Seat, 45° Metric Female 24° Cone Seat, and Metric Male 24° Cone Seat fittings. Our fittings are manufactured to the highest standards, ensuring their reliability and performance.

We also provide technical support to our customers. Whether you're unsure about which fitting to choose for your application, or you need help with installation, our team of experts is here to assist you.

If you're in the market for metric hose fittings, we invite you to contact us for a consultation. We can help you select the right fittings for your specific needs and provide you with a competitive quote. Don't hesitate to reach out if you have any questions or need further information about our products.

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References

  • "Hydraulic Fitting Handbook" - A comprehensive guide on hydraulic fittings, including metric hose fittings.
  • Various industry standards and specifications related to metric hose fittings, such as ISO standards.
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