*568-280 BUNA 70 SQUARE CUT RINGS

The SH70280 is an AS568-280 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring with an inside diameter of 13.984 in (355.19 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 14.262 in (362.25 mm). This square-cut ring seals with a broad flat contact band instead of the line contact of a round-section ring.

The material holds up against water, many alcohols, and propane and butane. Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, reliable performance in both static and dynamic service. 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 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.

Common environments for this compound include automotive, agricultural equipment, and construction equipment.

This item is sold individually under part number SH70280. Nominal inside diameter is listed as 14 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.