Engineered for demanding hydraulic and pneumatic sealing applications, this Buna-N (Nitrile) O-ring delivers reliable, leak-free performance under high-pressure conditions. With a firm 90A Shore A durometer rating, it resists extrusion and maintains its seal geometry even in high-pressure dynamic environments where softer compounds would fail.
Key Features
Material: Buna-N (NBR / Nitrile Butadiene Rubber)
Durometer: 90A Shore A — firm compound ideal for high-pressure applications
Temperature Range: -40°F to +250°F (-40°C to +121°C)
Pressure Rating: Suitable for high-pressure hydraulic systems
Fluid Compatibility: Petroleum-based hydraulic oils, mineral oils, fuels, water, and many industrial fluids
Standards: Available in AS568 and metric dash sizes
Applications
Hydraulic cylinders and actuators
Pneumatic fittings and valves
Pumps and motors
High-pressure fluid connectors
Industrial machinery and equipment
The harder 90A compound is specifically chosen over standard 70A for applications where system pressure would otherwise cause seal extrusion into clearance gaps, extending service life and reducing downtime.
