-438 BLACK FKM 75D O-RING

This o-ring is supplied in AS568-438 black Viton® (FKM) 75 Shore A built to an inside diameter of 6.225 in (158.12 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 6.775 in (172.09 mm), catalogued under part number V75438. It compresses into its gland to block fluid or gas migration across a joint.

It resists chlorinated solvents, petroleum oils and fuels, and engine and transmission fluids. That behavior comes from the compound itself: Viton® (FKM) delivers long service life in hot, chemically aggressive environments, excellent resistance to compression set and permeation. Continuous operating temperature is published at -15°F (-26.1°C) to 400°F (204.4°C). Exposure to low-molecular-weight organic acids or hot water and steam will shorten service life.

You will find this material specified across high-temperature process equipment, chemical processing, and aerospace.

Order part number V75438, sold individually. Unit weight is approximately 37.15 g and nominal inside diameter is listed as 6 1/4 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.