Engineered for demanding hydraulic applications, this Buna-N (NBR) O-ring features a 90 Shore A durometer hardness rating, delivering superior extrusion resistance and dimensional stability under high-pressure conditions. Ideal for use with petroleum-based hydraulic fluids, oils, and fuels, it maintains a reliable seal across a wide operating temperature range of -40°F to +250°F (-40°C to +121°C).
The elevated 90A hardness makes this O-ring the preferred choice over standard 70A compounds in high-pressure systems where back-up rings may not be practical, or where tighter clearance gaps demand a harder seal material. Manufactured to AS568 dimensional standards, it is compatible with standard hydraulic cylinder grooves and fittings.
Key Specifications
Material: Buna-N (NBR / Nitrile Butadiene Rubber)
Durometer: 90 Shore A
Temperature Range: -40°F to +250°F (-40°C to +121°C)
