O-Ring 4x2.5 NBR 70 Shore

Applications

The O-Ring 4x2.5 NBR 70 Shore is a precision rubber seal designed for reliable technical sealing in a wide range of industrial applications. It is commonly used in hydraulics and pneumatics, oil circuits, fittings, valves, and compact machine assemblies where space is limited and consistent sealing performance is required. The size 4x2.5 mm allows easy integration into small grooves, ensuring tight static and semi-dynamic sealing even under fluctuating operating conditions.

Material Advantages - NBR 70 Shore

Made from nitrile rubber (NBR) with a hardness of 70 Shore A, this O-ring offers an optimal balance between elasticity and mechanical strength. NBR provides high resistance to mineral oils, greases, fuels, and many industrial fluids. The material maintains dimensional stability, good compression set resistance, and abrasion resistance, which translates into long service life and reduced risk of leakage in critical sealing points.

Technical Data

• Product type: O-ring / sealing ring

• Dimensions: 4x2.5 mm

• Material: NBR (nitrile rubber)

• Hardness: 70 Shore A

• Color: black

• Sealing type: static and semi-dynamic

• Typical use: hydraulics, pneumatics, industrial equipment

Main Description

The O-Ring 4x2.5 NBR 70 Shore is a versatile technical sealing component developed for dependable performance in standard industrial environments. Thanks to proven NBR rubber, the seal effectively prevents leakage of working media while retaining flexibility and resistance to wear. The 70 Shore A hardness ensures secure groove fit and consistent sealing pressure, even during long-term operation.

This rubber gasket is widely used in cylinders, connectors, control valves, and compact mechanical assemblies where reliability and repeatable quality are essential. As an O-ring, it meets the expectations of maintenance departments and machine manufacturers looking for simple, cost-effective, and durable sealing solutions. The 4x2.5 NBR O-ring is a practical choice for companies sourcing dependable seals for hydraulics and pneumatics in B2B environments.

FAQ - Frequently Asked Questions

Where is the 4x2.5 NBR O-ring typically used?
It is commonly used in hydraulics, pneumatics, and oil systems as a static or semi-dynamic seal.

What does 70 Shore hardness mean?
70 Shore A is a standard hardness that provides good sealing ability, wear resistance, and easy installation.

Is NBR resistant to oils and greases?
Yes, NBR offers very good resistance to mineral oils, greases, and fuels.

Is this O-ring suitable for industrial use?
Yes, it is designed specifically for industrial and technical applications.

Can it be used in pneumatic systems?
Yes, this O-ring is frequently applied in pneumatic installations and components.