Buna 70-279-Black-Pk5

Part number SB-H70279-5 is an AS568-279 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 12.984 in (329.79 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 13.262 in (336.85 mm). An o-ring delivers dependable bidirectional sealing in a compact groove envelope. Source specification: 13.25IDX13"ODX.125"CS.

The compound resists propane and butane, water, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to polar solvents or automotive brake fluid will shorten service life.

It sees regular use in hydraulic and pneumatic systems, fluid power, and construction equipment.

Stocked as SB-H70279-5 and sold by the bag. Nominal inside diameter is listed as 13 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.