568-443 BUNA 70 SQUARE CUT RINGS

The SH70443 is an AS568-443 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring with an inside diameter of 7.475 in (189.87 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 8.025 in (203.84 mm). This square-cut ring resists the spiral failure that affects round rings on long reciprocating strokes.

Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. It resists water, petroleum-based oils, and hydraulic fluids. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). The profile itself contributes a rectangular section that will not roll in the groove 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, fluid power, and automotive.

Reference part number SH70443 when ordering; the item is sold individually. Unit weight is approximately 28.979 g. As always, verify media compatibility and operating conditions against the requirements of your specific application.