568-378 BUNA 70 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-378 black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 10.475 in (266.07 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 10.895 in (276.73 mm), catalogued under part number SH70378. It presents a flat rectangular section that cannot roll or twist in its groove, making it a dependable static seal.

Buna-N (Nitrile) is specified here for strong abrasion and tear resistance, economical choice for high-volume maintenance programs. The material holds up against hydraulic fluids, many alcohols, and greases and lubricants. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It is not the right choice where strong acids or automotive brake fluid are present. The profile itself contributes a flat contact band that spreads sealing load across a wider area 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.

Typical settings include general industrial maintenance, construction equipment, and hydraulic and pneumatic systems.

This item is sold individually under part number SH70378. Nominal inside diameter is listed as 10 1/2 inch. Check the compound against your process media, pressure and temperature before committing to a design.