568-217 BUNA 70 SQUARE CUT RINGS

APG stocks the SH70217, an AS568-217 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring supplied with an inside diameter of 1.171 in (29.74 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.449 in (36.8 mm). A square-cut ring offers greater contact area against the gland wall than an equivalent o-ring.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, economical choice for high-volume maintenance programs. It resists hydraulic fluids, water, and greases and lubricants. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. The profile itself contributes a flat contact band that spreads sealing load across a wider area and a rectangular section that will not roll in the groove. Note that a square section is less suited to high-speed rotary service, where the larger contact area raises friction and heat.

Common environments for this compound include fluid power, hydraulic and pneumatic systems, and general industrial maintenance.

Stocked as SH70217 and sold individually. Unit weight is approximately 1.5014 g and nominal inside diameter is listed as 1 3/16 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.