O-ring 131.5x3.5 NBR 90 ShA

O-ring for technical sealing applications
High resistance NBR 90 ShA material
Use in hydraulics and pneumatics

Main description

The O-ring 131.5x3.5 NBR 90 ShA is a precision rubber sealing ring designed for professional technical sealing in demanding industrial applications. With a diameter of 131.5x3.5, this Oring is intended for larger sealing grooves where dimensional stability, pressure resistance and long service life are essential.

Manufactured from NBR (nitrile rubber) with a hardness of 90 ShA, this O-ring offers increased mechanical strength compared to standard 70 ShA seals. The higher hardness reduces extrusion under pressure and ensures reliable sealing performance in tight tolerances and high-pressure environments. This makes it especially suitable for hydraulic and pneumatic sealing systems, where consistent sealing is required despite pressure fluctuations.

NBR material provides excellent resistance to mineral oils, lubricants, greases and fuels commonly found in industrial machinery. Compared to softer sealing solutions or a standard flat gasket, an O-ring delivers improved sealing efficiency, easier installation and repeatable performance. As a technical sealing solution, it is widely used in pumps, valves, cylinders, distributors and mechanical housings.

The Oring 131.5x3.5 NBR 90 ShA is optimized for static and semi-dynamic sealing, where high resistance, durability and predictable behavior are critical. It is a preferred choice for B2B customers, technical wholesalers and maintenance services requiring dependable rubber seals with stable material properties and immediate availability.

FAQ - Frequently Asked Questions

What material is the O-ring made of?
It is made of NBR (nitrile rubber), resistant to oils and lubricants.

What does 90 ShA hardness mean?
90 ShA indicates increased hardness, providing higher pressure resistance and reduced deformation.

Where is this Oring typically used?
In hydraulics, pneumatics, industrial machinery and technical sealing systems.

Is the Oring suitable for oil contact?
Yes, NBR is well suited for contact with mineral oils, fuels and greases.

Can an O-ring replace a flat gasket?
Yes, in many applications an Oring provides better sealing and easier installation.