Buna 70-137-Black-Pk10

This o-ring is supplied in AS568-137 black Buna-N (Nitrile) 70 Shore A with an inside diameter of 2.05 in (52.07 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.256 in (57.3 mm), catalogued under part number SB-H70137-10. It provides a reliable static or dynamic seal by deforming into its gland under assembly load. Supplementary detail from the product record: 2.25IDX2.0625"ODX.0938"CS.

The compound resists petroleum-based oils, greases and lubricants, and water. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C).

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

Stocked as SB-H70137-10 and sold by the bag. Nominal inside diameter is listed as 2 1/16 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.