-238 BLACK FKM 90D O-RING

This o-ring is supplied in AS568-238 black Viton® (FKM) 90 Shore A measuring 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), catalogued under part number V90238. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

It resists aromatic hydrocarbons, engine and transmission fluids, and chlorinated solvents. That behavior comes from the compound itself: Viton® (FKM) is known for the industry benchmark where nitrile reaches its thermal limit and outstanding high-temperature capability. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). Exposure to hot water and steam or low-molecular-weight organic acids will shorten service life.

Maintenance and OEM teams specify it across semiconductor equipment, automotive fuel systems, and aerospace.

This item is sold individually under part number V90238. Unit weight is approximately 5.2473 g and nominal inside diameter is listed as 3 1/2 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.