-321 BLACK FKM 75D O-RING

Part number V70321 is an AS568-321 black Viton® (FKM) 75 Shore A O-Ring built to an inside diameter of 1.162 in (29.51 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.582 in (40.18 mm). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

The compound resists aromatic hydrocarbons, chlorinated solvents, and aggressive chemicals. Viton® (FKM) is valued for long service life in hot, chemically aggressive environments and the industry benchmark where nitrile reaches its thermal limit. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). Exposure to low-molecular-weight organic acids or amines will shorten service life.

Common environments for this compound include aerospace, semiconductor equipment, and chemical processing.

This item is sold individually under part number V70321. Unit weight is approximately 4.55 g and nominal inside diameter is listed as 1 3/16 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.