568-223 BUNA 70 SQUARE CUT RINGS

This square-cut ring is supplied in AS568-223 black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 1.609 in (40.87 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.887 in (47.93 mm), catalogued under part number SH70223. It seals with a broad flat contact band instead of the line contact of a round-section ring.

The material holds up against water, petroleum-based oils, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is known for reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. 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 construction equipment, agricultural equipment, and general industrial maintenance.

Order part number SH70223, sold individually. Unit weight is approximately 1.9634 g and nominal inside diameter is listed as 1 5/8 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.