-389 BLUE FKM 75D O-RING

This o-ring is supplied in AS568-389 blue Viton® (FKM) 75 Shore A measuring an inside diameter of 19.953 in (506.81 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 20.373 in (517.47 mm), catalogued under part number V75MD389. It provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Expect good resistance to engine and transmission fluids, many acids, and aromatic hydrocarbons. 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. Service temperature is rated from -15°F (-26.1°C) through 400°F (204.4°C). It should not be specified for service in low-molecular-weight organic acids or ketones and esters.

This o-ring meets FDA requirements for food contact, carries NSF listing, and is metal detectable for HACCP and foreign-body control programs. Common environments for this compound include chemical processing, high-temperature process equipment, and oil and gas.

Reference part number V75MD389 when ordering; the item is sold individually. Nominal inside diameter is listed as 20 inch. Review your operating media and conditions against this specification before installation.