568-258 BUNA 70 SQUARE CUT RINGS

SH70258 is an AS568-258 black Buna-N (Nitrile) 70 Shore A square profile Quad-Ring with an inside diameter of 5.984 in (151.99 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 6.262 in (159.05 mm). In service, this quad-ring delivers lower friction and better sealing stability than a comparable round-section o-ring.

The compound resists greases and lubricants, water, and hydraulic fluids. Buna-N (Nitrile) is valued for low compression set under sustained load, reliable performance in both static and dynamic service. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service.

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

Stocked as SH70258 and sold individually. Unit weight is approximately 7.0456 g. Check the compound against your process media, pressure and temperature before committing to a design. For a size or compound outside the standard catalog, APG can quote from a print or sample.