Metric Standard Fitting Factory

1、What Is Metric Standard Fitting ?

Metric standard fittings are hydraulic connectors designed according to international metric thread standards. They are widely used to connect hoses, tubes, and pipes in hydraulic systems. One key advantage is high compatibility and standardized sizing , which reduces installation errors by up to 80% compared to non-standard fittings.

These fittings are especially common in European and Asian machinery, where metric systems are the primary standard.

2、Key Features of Metric Standard Fittings

（1）High Precision Threading

Metric fittings are manufactured with strict tolerance control. Typical thread tolerance can be within ±0.02 mm , ensuring tight sealing and reduced leakage risks.

（2）Wide Pressure Range

Depending on the material and design, metric fittings can withstand pressures ranging from 100 bar to over 700 bar , making them suitable for both light-duty and heavy-duty systems.

（3）Strong Compatibility

Metric fittings can be used with various sealing methods such as O-ring, cone seal, and bonded seal, ensuring flexibility in different applications.

3、Common Types of Metric Fittings

4、Applications in Different Industries

Metric standard fittings are widely used in multiple industries due to their reliability and standardized design.

• Construction machinery (excavators, cranes)
• Agricultural equipment (tractors, irrigation systems)
• Industrial automation systems
• Marine and aerospace applications

In heavy machinery, using proper metric fittings can extend system lifespan by 20–30% by reducing leakage and mechanical stress.

5、About OPK Fitting

About OPK Fitting
OPK FITTING Hydraulic Equipment Factory is a specialized domestic factory with hydraulic pipes and adaptors production experience. Our managing scope relates to various fields such as hydraulic systems etc.; Including all kinds of materials with different pressure levels, flexible hydraulic hoses with various size criteria, hose fitting, adaptor, etc. They have been respectively applied in the hydraulic and fluid conveyance systems of industries, such as machinery, metallurgy petroleum, construction, ships, space-flight, agriculture, pharmaceutical, food, and so forth.

Over 10 years of experience. A team of skilled design professionals and talent. Excellent product quality and thoughtful customer service.

6、How to Select the Right Metric Fitting

1. Confirm thread size and standard (e.g., M12, M18)
2. Check pressure rating and system requirements
3. Choose material (carbon steel, stainless steel)
4. Verify sealing type and compatibility

For example, in a hydraulic system operating at 250 bar , selecting a fitting rated at 300 bar or higher ensures safety and durability.

7、FAQ

Q1: What does metric standard fitting mean?
It refers to fittings designed according to metric thread standards used in hydraulic systems worldwide.

Q2: Are metric fittings better than imperial fittings?
Metric fittings are more standardized globally, especially in Europe and Asia, making them easier to source and replace.

Q3: Can metric fittings handle high pressure?
Yes, high-quality metric fittings can handle pressures up to 700 bar depending on design and material.