-928 BLACK BUNA 70D O-RING

Part number H70MD928 is an AS568-928 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 2.09 in (53.09 mm), a cross section of 0.118 in (3 mm), and an outside diameter of 2.326 in (59.08 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

The material holds up against many alcohols, propane and butane, and water. That behavior comes from the compound itself: Buna-N (Nitrile) delivers low compression set under sustained load and the most widely specified general-purpose sealing elastomer. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving polar solvents or strong acids call for a different compound.

The compound is metal detectable for HACCP and foreign-body control programs. You will find this material specified across hydraulic and pneumatic systems, general industrial maintenance, and automotive.

Stocked as H70MD928 and sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.