568-237 BUNA 70 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-237 black Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 3.359 in (85.32 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.637 in (92.38 mm), catalogued under part number SH70237. It provides an economical lathe-cut alternative where a moulded o-ring is not required.

This material stands up to many alcohols, propane and butane, and hydraulic fluids. Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, reliable performance in both static and dynamic service. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to polar solvents or ozone and direct sunlight will shorten service life. 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.

You will find this material specified across automotive, fluid power, and hydraulic and pneumatic systems.

Order part number SH70237, sold individually. Unit weight is approximately 4.0241 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.