Part number SH70908 is an AS568-908 black Buna-N (Nitrile) 70 Shore A square profile Quad-Ring supplied with an inside diameter of 0.644 in (16.36 mm), a cross section of 0.087 in (2.21 mm), and an outside diameter of 0.818 in (20.78 mm). A quad-ring delivers lower friction and better sealing stability than a comparable round-section o-ring.
It resists many alcohols, petroleum-based oils, and water. Buna-N (Nitrile) delivers strong abrasion and tear resistance, the most widely specified general-purpose sealing elastomer. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with ozone and direct sunlight or automotive brake fluid.
Common environments for this compound include construction equipment, agricultural equipment, and fluid power.
This item is sold individually under part number SH70908. Nominal inside diameter is listed as 1/2 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
description 568-908 BUNA 70 SQUARE CUT RINGS
Actual_CS 0.087 inch (2.21 mm)
Actual_ID 0.644 inch (16.36 mm)
Actual_OD 0.818 inch (20.78 )
ProductCode Description O-Rings - Square/Quad - Commodity