-321 BLACK BUNA 70D O-RING

This o-ring is supplied in AS568-321 black Buna-N (Nitrile) 70 Shore A with an inside diameter of 1.162 in (29.51 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.582 in (40.18 mm), catalogued under part number H70321. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Buna-N (Nitrile) is specified here for economical choice for high-volume maintenance programs and most widely specified general-purpose sealing elastomer. Expect good resistance to greases and lubricants, petroleum-based oils, and water. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to polar solvents or automotive brake fluid will shorten service life.

Maintenance and OEM teams specify it across hydraulic and pneumatic systems, agricultural equipment, and general industrial maintenance.

H70321 ships individually. Unit weight is approximately 3.012 g and nominal inside diameter is listed as 1 3/16 inch. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.