-177 BLACK BUNA 70D O-RING

This o-ring is supplied in AS568-177 black Buna-N (Nitrile) 70 Shore A with an inside diameter of 9.487 in (240.97 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 9.693 in (246.2 mm), catalogued under part number H70177. It compresses into its gland to block fluid or gas migration across a joint.

The compound resists propane and butane, petroleum-based oils, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is known for reliable performance in both static and dynamic service, low compression set under sustained load. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving automotive brake fluid or polar solvents call for a different compound.

Typical settings include general industrial maintenance, agricultural equipment, and hydraulic and pneumatic systems.

Reference part number H70177 when ordering; the item is sold individually. Unit weight is approximately 5.0387 g and nominal inside diameter is listed as 9 1/2 inch. Check the compound against your process media, pressure and temperature before committing to a design. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.