568-358 BUNA 70 SQUARE CUT RINGS

Part number SH70358 is an AS568-358 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring supplied with an inside diameter of 5.6 in (142.24 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 6.02 in (152.91 mm). A square-cut ring offers greater contact area against the gland wall than an equivalent o-ring.

The compound resists hydraulic fluids, petroleum-based oils, and water. That behavior comes from the compound itself: Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to automotive brake fluid or ozone and direct sunlight will shorten service life. 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.

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

This item is sold individually under part number SH70358. Nominal inside diameter is listed as 5 5/8 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.