-379 BLACK BUNA 70D O-RING

The H70379 is an AS568-379 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 10.975 in (278.77 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 11.395 in (289.43 mm). This o-ring compresses into its gland to block fluid or gas migration across a joint.

As a material, Buna-N (Nitrile) is valued for reliable performance in both static and dynamic service, strong abrasion and tear resistance. Expect good resistance to propane and butane, greases and lubricants, and petroleum-based oils. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

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

H70379 ships individually. Unit weight is approximately 24.576 g and nominal inside diameter is listed as 11 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. 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.