-394 BLACK BUNA 90D O-RING

This o-ring is supplied in AS568-394 black Buna-N (Nitrile) 90 Shore A supplied with an inside diameter of 24.94 in (633.48 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 25.36 in (644.14 mm), catalogued under part number H90394. It compresses into its gland to block fluid or gas migration across a joint.

It resists propane and butane, petroleum-based oils, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs and 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 automotive brake fluid or ketones are present.

Common environments for this compound include construction equipment, general industrial maintenance, and hydraulic and pneumatic systems.

Stocked as H90394 and sold individually. Unit weight is approximately 58.58 g. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.