-256 BLACK FKM 75D O-RING

The V75256 is an AS568-256 black Viton® (FKM) 75 Shore A O-Ring with an inside diameter of 5.734 in (145.64 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 6.012 in (152.7 mm). This o-ring compresses into its gland to block fluid or gas migration across a joint.

As a material, Viton® (FKM) offers the industry benchmark where nitrile reaches its thermal limit and long service life in hot, chemically aggressive environments. The material holds up against many acids, aggressive chemicals, and petroleum oils and fuels. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). It should not be specified for service in hot water and steam or amines.

You will find this material specified across aerospace, high-temperature process equipment, and automotive fuel systems.

Reference part number V75256 when ordering; the item is sold individually. Nominal inside diameter is listed as 5 3/4 inch. Check the compound against your process media, pressure and temperature before committing to a design. 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.