568-147 BUNA 70 SQUARE CUT RINGS

Ordered as SH70147, this is an AS568-147 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring supplied with an inside diameter of 2.675 in (67.95 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.881 in (73.18 mm). The square-cut ring presents a flat rectangular section that cannot roll or twist in its groove, making it a dependable static seal.

Expect good resistance to greases and lubricants, many alcohols, and petroleum-based oils. Buna-N (Nitrile) is valued for low compression set under sustained load, strong abrasion and tear resistance. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in automotive brake fluid or ketones. 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 agricultural equipment, construction equipment, and automotive.

Reference part number SH70147 when ordering; the item is sold individually. Unit weight is approximately 1.74 g and nominal inside diameter is listed as 2 11/16 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.