568-351 BUNA 70 SQUARE CUT RINGS

SH70351 is an AS568-351 black Buna-N (Nitrile) 70 Shore A square profile Quad-Ring with an inside diameter of 4.725 in (120.02 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 5.145 in (130.68 mm). In service, this quad-ring delivers lower friction and better sealing stability than a comparable round-section o-ring.

Expect good resistance to water, propane and butane, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer and an economical choice for high-volume maintenance programs. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C).

You will find this material specified across fluid power, construction equipment, and automotive.

Order part number SH70351, sold individually. Unit weight is approximately 10.931 g and nominal inside diameter is listed as 4 3/4 inch. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.