-331 BLACK BUNA 70D O-RING

H70331 is an AS568-331 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 2.225 in (56.52 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 2.645 in (67.18 mm). In service, this o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

Buna-N (Nitrile) is specified here for strong abrasion and tear resistance, reliable performance in both static and dynamic service. The compound resists petroleum-based oils, greases and lubricants, and hydraulic fluids. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where polar solvents or ketones are present.

Maintenance and OEM teams specify it across agricultural equipment, automotive, and hydraulic and pneumatic systems.

Stocked as H70331 and sold individually. Unit weight is approximately 5.299 g and nominal inside diameter is listed as 2 1/4 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.