-238 BLACK FKM 75D O-RING

V70238 is an AS568-238 black Viton® (FKM) 75 Shore A O-Ring supplied with an inside diameter of 3.484 in (88.49 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.762 in (95.55 mm). In service, this o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

This material stands up to petroleum oils and fuels, aromatic hydrocarbons, and many acids. That behavior comes from the compound itself: Viton® (FKM) is known for long service life in hot, chemically aggressive environments and the industry benchmark where nitrile reaches its thermal limit. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). Applications involving low-molecular-weight organic acids or ketones and esters call for a different compound.

You will find this material specified across oil and gas, chemical processing, and automotive fuel systems.

Stocked as V70238 and sold individually. Unit weight is approximately 5.146 g. Check the compound against your process media, pressure and temperature before committing to a design.