-137 BLACK BUNA 90D O-RING

This o-ring is supplied in AS568-137 black Buna-N (Nitrile) 90 Shore A measuring an inside diameter of 2.05 in (52.07 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.256 in (57.3 mm), catalogued under part number H90137. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Expect good resistance to hydraulic fluids, greases and lubricants, and water. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, low compression set under sustained load. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving strong acids or polar solvents call for a different compound.

You will find this material specified across fluid power, agricultural equipment, and hydraulic and pneumatic systems.

Order part number H90137, sold individually. Unit weight is approximately 1.2518 g and nominal inside diameter is listed as 2 1/16 inch. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.