568-441 BUNA 70 SQUARE CUT RINGS

SH70441 is an AS568-441 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring with an inside diameter of 6.975 in (177.17 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 7.525 in (191.14 mm). In service, this square-cut ring presents a flat rectangular section that cannot roll or twist in its groove, making it a dependable static seal.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, strong abrasion and tear resistance. It resists hydraulic fluids, propane and butane, and water. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It should not be specified for service in ketones or strong acids. The profile itself contributes greater resistance to extrusion than a round section of the same size and simple lathe-cut manufacture at low tooling cost. Note that a square section is less suited to high-speed rotary service, where the larger contact area raises friction and heat.

You will find this material specified across general industrial maintenance, construction equipment, and automotive.

SH70441 ships individually. Nominal inside diameter is listed as 7 inch. Check the compound against your process media, pressure and temperature before committing to a design.