568-251 BUNA 70 SQUARE CUT RINGS

Part number SH70251 is an AS568-251 black Buna-N (Nitrile) 70 Shore A square profile Quad-Ring measuring an inside diameter of 5.109 in (129.77 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 5.387 in (136.83 mm). A quad-ring provides a dual sealing band on each contact face for improved reliability.

Buna-N (Nitrile) is specified here for most widely specified general-purpose sealing elastomer and low compression set under sustained load. It resists hydraulic fluids, water, and propane and butane. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C).

It sees regular use in hydraulic and pneumatic systems, construction equipment, and automotive.

Order part number SH70251, sold individually. Nominal inside diameter is listed as 5 1/8 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.