-139 WHITE BUNA 70D FDA O-RING

This o-ring is supplied in AS568-139 white Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 2.175 in (55.25 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.381 in (60.48 mm), catalogued under part number H70FDA139. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

As a material, Buna-N (Nitrile) delivers strong abrasion and tear resistance, reliable performance in both static and dynamic service. Expect good resistance to propane and butane, water, and petroleum-based oils. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving strong acids or automotive brake fluid call for a different compound.

This item meets FDA requirements for food contact under 21 CFR 177.2600. It sees regular use in agricultural equipment, general industrial maintenance, and fluid power.

Reference part number H70FDA139 when ordering; the item is sold individually. Unit weight is approximately 1.276 g and nominal inside diameter is listed as 2 3/16 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.