568-372 BUNA 70 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-372 black Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 8.725 in (221.62 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 9.145 in (232.28 mm), catalogued under part number SH70372. It 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, most widely specified general-purpose sealing elastomer. The compound resists hydraulic fluids, petroleum-based oils, and propane and butane. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). The profile itself contributes simple lathe-cut manufacture at low tooling cost and a rectangular section that will not roll in the groove. Note that a square section is less suited to high-speed rotary service, where the larger contact area raises friction and heat.

It sees regular use in construction equipment, automotive, and general industrial maintenance.

This item is sold individually under part number SH70372. Application requirements vary, so validate compatibility with your process conditions prior to installation.