568-239 BUNA 70 SQUARE CUT RINGS

This quad-ring is supplied in AS568-239 black Buna-N (Nitrile) 70 Shore A square profile supplied with an inside diameter of 3.609 in (91.67 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.887 in (98.73 mm), catalogued under part number SH70239. It provides a dual sealing band on each contact face for improved reliability.

Buna-N (Nitrile) is specified here for economical choice for high-volume maintenance programs and most widely specified general-purpose sealing elastomer. The material holds up against propane and butane, hydraulic fluids, and petroleum-based oils. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to ketones or automotive brake fluid will shorten service life.

It sees regular use in hydraulic and pneumatic systems, general industrial maintenance, and construction equipment.

Reference part number SH70239 when ordering; the item is sold individually. Unit weight is approximately 4.3059 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.