568-022 BUNA 70 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-022 black Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 0.989 in (25.12 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.129 in (28.68 mm), catalogued under part number SH70022. It resists the spiral failure that affects round rings on long reciprocating strokes.

The material holds up against petroleum-based oils, hydraulic fluids, and propane and butane. Buna-N (Nitrile) is widely chosen for an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). 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 construction equipment, general industrial maintenance, and automotive.

Reference part number SH70022 when ordering; the item is sold individually. Unit weight is approximately 0.267 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.