568-457 BUNA 70 SQUARE CUT RINGS

Part number SH70457 is an AS568-457 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring measuring an inside diameter of 13.975 in (354.97 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 14.525 in (368.94 mm). A square-cut ring seals with a broad flat contact band instead of the line contact of a round-section ring.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, low compression set under sustained load. The material holds up against many alcohols, water, and petroleum-based oils. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving automotive brake fluid or ketones call for a different compound. The profile itself contributes greater resistance to extrusion than a round section of the same size 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.

Maintenance and OEM teams specify it across hydraulic and pneumatic systems, construction equipment, and general industrial maintenance.

SH70457 ships individually. Nominal inside diameter is listed as 14 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.