568-462 BUNA 70 SQUARE CUT RINGS

Part number SH70462 is an AS568-462 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring supplied with an inside diameter of 16.455 in (417.96 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 17.005 in (431.93 mm). A square-cut ring seals with a broad flat contact band instead of the line contact of a round-section ring.

Expect good resistance to propane and butane, hydraulic fluids, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is known for reliable performance in both static and dynamic service, an economical choice for high-volume maintenance programs. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to ketones or strong acids will shorten service life. The profile itself contributes a rectangular section that will not roll in the groove and greater resistance to extrusion than a round section of the same size. Note that a square section is less suited to high-speed rotary service, where the larger contact area raises friction and heat.

It sees regular use in agricultural equipment, fluid power, and automotive.

Reference part number SH70462 when ordering; the item is sold individually. Nominal inside diameter is listed as 16 1/2 inch. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.