-311 BLACK BUNA 90D O-RING

This o-ring is supplied in AS568-311 black Buna-N (Nitrile) 90 Shore A with an inside diameter of 0.537 in (13.64 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 0.957 in (24.31 mm), catalogued under part number H90311. It remains the most cost-effective sealing element available for pressurized assemblies.

Buna-N (Nitrile) is specified for low compression set under sustained load, strong abrasion and tear resistance. The material holds up against propane and butane, greases and lubricants, and many alcohols. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Applications involving strong acids or ozone and direct sunlight call for a different compound.

You will find this material specified across fluid power, agricultural equipment, and automotive.

H90311 ships individually. Unit weight is approximately 1.797 g and nominal inside diameter is listed as 9/16 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.