*568-315 BUNA 70 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-315 black Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 0.787 in (19.99 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.207 in (30.66 mm), catalogued under part number SH70315. It presents a flat rectangular section that cannot roll or twist in its groove, making it a dependable static seal.

It resists petroleum-based oils, propane and butane, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) delivers strong abrasion and tear resistance, reliable performance in both static and dynamic service. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Verify compatibility before use with polar solvents or ketones. The profile itself contributes simple lathe-cut manufacture at low tooling cost 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.

It sees regular use in hydraulic and pneumatic systems, construction equipment, and automotive.

Order part number SH70315, sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.