-202 BLACK BUNA 50D O-RING

Ordered as H50202, this is an AS568-202 black Buna-N (Nitrile) 50 Shore A O-Ring with an inside diameter of 0.234 in (5.94 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.512 in (13 mm). The o-ring compresses into its gland to block fluid or gas migration across a joint.

It resists hydraulic fluids, greases and lubricants, and water. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).

You will find this material specified across agricultural equipment, construction equipment, and hydraulic and pneumatic systems.

H50202 ships individually. Nominal inside diameter is listed as 1/4 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.