568-395 BUNA 70 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-395 black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 25.94 in (658.88 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 26.36 in (669.54 mm), catalogued under part number SH70395. It presents a flat rectangular section that cannot roll or twist in its groove, making it a dependable static seal.

This material stands up to water, many alcohols, and greases and lubricants. Buna-N (Nitrile) is specified for reliable performance in both static and dynamic service, strong abrasion and tear resistance. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where ketones or polar solvents are present. The profile itself contributes a rectangular section that will not roll in the groove and a flat contact band that spreads sealing load across a wider area. 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 construction equipment, agricultural equipment, and fluid power.

Order part number SH70395, sold individually. As always, verify media compatibility and operating conditions against the requirements of your specific application.