568-165 BUNA 70 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-165 black Buna-N (Nitrile) 70 Shore A with an inside diameter of 6.487 in (164.77 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 6.693 in (170 mm), catalogued under part number SH70165. It presents a flat rectangular section that cannot roll or twist in its groove, making it a dependable static seal.

The compound resists water, petroleum-based oils, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). The profile itself contributes simple lathe-cut manufacture at low tooling cost and greater resistance to extrusion than a round section of the same size. 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 fluid power, general industrial maintenance, and construction equipment.

This item is sold individually under part number SH70165. Unit weight is approximately 4.1696 g. 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.