568-145 BUNA 70 SQUARE CUT RINGS

Part number SH70145 is an AS568-145 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring built to an inside diameter of 2.55 in (64.77 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.756 in (70 mm). A square-cut ring presents a flat rectangular section that cannot roll or twist in its groove, making it a dependable static seal.

It resists hydraulic fluids, greases and lubricants, and many alcohols. Buna-N (Nitrile) offers the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Verify compatibility before use with ketones or polar solvents. The profile itself contributes greater resistance to extrusion than a round section of the same size 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.

Typical settings include general industrial maintenance, automotive, and fluid power.

Reference part number SH70145 when ordering; the item is sold individually. Unit weight is approximately 1.404 g. Check the compound against your process media, pressure and temperature before committing to a design.