568-033 BUNA 70 SQUARE CUT RINGS

SH70033 is an AS568-033 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring with an inside diameter of 1.989 in (50.52 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 2.129 in (54.08 mm). In service, this square-cut ring offers greater contact area against the gland wall than an equivalent o-ring.

As a material, Buna-N (Nitrile) delivers strong abrasion and tear resistance, reliable performance in both static and dynamic service. The compound resists water, propane and butane, and petroleum-based oils. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to ozone and direct sunlight or strong acids will shorten service life. The profile itself contributes a flat contact band that spreads sealing load across a wider area 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.

Common environments for this compound include general industrial maintenance, agricultural equipment, and construction equipment.

This item is sold individually under part number SH70033. Unit weight is approximately 0.569 g and nominal inside diameter is listed as 2 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.