568-902 BUNA 70 SQUARE CUT RINGS

Ordered as SH70902, this is an AS568-902 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring measuring an inside diameter of 0.239 in (6.07 mm), a cross section of 0.064 in (1.63 mm), and an outside diameter of 0.367 in (9.32 mm). The square-cut ring offers greater contact area against the gland wall than an equivalent o-ring.

Buna-N (Nitrile) is specified for low compression set under sustained load, reliable performance in both static and dynamic service. It resists many alcohols, water, and petroleum-based oils. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving ozone and direct sunlight or ketones call for a different compound. 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.

Maintenance and OEM teams specify it across general industrial maintenance, agricultural equipment, and construction equipment.

SH70902 ships individually. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.