Buna 70-312-Black-Pk50

APG stocks the SB-H70312-50, an AS568-312 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 0.6 in (15.24 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.02 in (25.91 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint. Supplementary detail from the product record: 1IDX.625"ODX.1875"CS.

The compound resists propane and butane, water, and hydraulic fluids. Buna-N (Nitrile) is specified for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to ozone and direct sunlight or ketones will shorten service life.

You will find this material specified across fluid power, general industrial maintenance, and automotive.

SB-H70312-50 ships by the bag. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.