-157 BLACK BUNA 50D O-RING

This o-ring is supplied in AS568-157 black Buna-N (Nitrile) 50 Shore A supplied with an inside diameter of 4.487 in (113.97 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 4.693 in (119.2 mm), catalogued under part number H50157. It delivers dependable bidirectional sealing in a compact groove envelope.

Expect good resistance to propane and butane, greases and lubricants, and water. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving polar solvents or ketones call for a different compound.

Maintenance and OEM teams specify it across fluid power, general industrial maintenance, and construction equipment.

H50157 ships individually. Nominal inside diameter is listed as 4 1/2 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.