-904 BLACK BUNA 70D O-RING

H70904 is an AS568-904 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 0.351 in (8.92 mm), a cross section of 0.072 in (1.83 mm), and an outside diameter of 0.495 in (12.57 mm). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Buna-N (Nitrile) is specified here for most widely specified general-purpose sealing elastomer and economical choice for high-volume maintenance programs. The compound resists water, many alcohols, and petroleum-based oils. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving automotive brake fluid or ozone and direct sunlight call for a different compound.

Common environments for this compound include general industrial maintenance, fluid power, and hydraulic and pneumatic systems.

H70904 ships individually. Unit weight is approximately 0.111 g and nominal inside diameter is listed as 1/4 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. 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.