568-432 BUNA 70 SQUARE CUT RINGS

Part number SH70432 is an AS568-432 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring supplied with an inside diameter of 5.35 in (135.89 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.9 in (149.86 mm). A square-cut ring offers greater contact area against the gland wall than an equivalent o-ring.

Expect good resistance to many alcohols, greases and lubricants, and petroleum-based oils. Buna-N (Nitrile) delivers low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). The profile itself contributes greater resistance to extrusion than a round section of the same size 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.

Common environments for this compound include agricultural equipment, construction equipment, and hydraulic and pneumatic systems.

Reference part number SH70432 when ordering; the item is sold individually. Unit weight is approximately 19.8759 g and nominal inside diameter is listed as 5 3/8 inch. Review your operating media and conditions against this specification before installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.