-311 BLACK BUNA 50D O-RING

Ordered as H50311, this is an AS568-311 black Buna-N (Nitrile) 50 Shore A O-Ring built to an inside diameter of 0.537 in (13.64 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 0.957 in (24.31 mm). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.

It resists petroleum-based oils, hydraulic fluids, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

You will find this material specified across construction equipment, automotive, and general industrial maintenance.

Stocked as H50311 and sold individually. As always, verify media compatibility and operating conditions against the requirements of your specific application.