568-159 BUNA 70 SQUARE CUT RINGS

Ordered as SH70159, this is an AS568-159 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring with an inside diameter of 4.987 in (126.67 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 5.193 in (131.9 mm). The square-cut ring provides an economical lathe-cut alternative where a moulded o-ring is not required.

As a material, Buna-N (Nitrile) is valued for strong abrasion and tear resistance, reliable performance in both static and dynamic service. The compound resists propane and butane, petroleum-based oils, and many alcohols. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with automotive brake fluid or strong acids. The profile itself contributes a rectangular section that will not roll in the groove and greater resistance to extrusion than a round section of the same size. 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, fluid power, and hydraulic and pneumatic systems.

Order part number SH70159, sold individually. Unit weight is approximately 3.1883 g and nominal inside diameter is listed as 5 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.