-143 BLACK BUNA 90D O-RING

H90143 is an AS568-143 black Buna-N (Nitrile) 90 Shore A O-Ring measuring an inside diameter of 2.425 in (61.6 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.631 in (66.83 mm). In service, this o-ring delivers dependable bidirectional sealing in a compact groove envelope.

It resists propane and butane, many alcohols, and petroleum-based oils. Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It is not the right choice where strong acids or automotive brake fluid are present.

It sees regular use in fluid power, automotive, and general industrial maintenance.

Stocked as H90143 and sold individually. Unit weight is approximately 1.5333 g and nominal inside diameter is listed as 2 7/16 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.