Ordered as SH70231, this is an AS568-231 black Buna-N (Nitrile) 70 Shore A square profile Quad-Ring built to an inside diameter of 2.609 in (66.27 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 2.887 in (73.33 mm). The quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.
Buna-N (Nitrile) is specified here for most widely specified general-purpose sealing elastomer, reliable performance in both static and dynamic service. This material stands up to water, hydraulic fluids, and petroleum-based oils. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C).
Common environments for this compound include hydraulic and pneumatic systems, general industrial maintenance, and automotive.
This item is sold individually under part number SH70231. Unit weight is approximately 3.1549 g and nominal inside diameter is listed as 2 5/8 inch. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.
description 568-231 BUNA 70 SQUARE CUT RINGS
Actual_CS 0.139 inch (3.53 mm)
Actual_ID 2.609 inch (66.27 mm)
Actual_OD 2.887 inch (73.33 mm)
ProductCode Description O-Rings - Square/Quad - Commodity