-438 BROWN FKM 75D O-RING

This o-ring is supplied in AS568-438 brown Viton® (FKM) 75 Shore A supplied with 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 VB75438. It creates a positive seal at flange, piston and rod interfaces without added hardware.

This material stands up to engine and transmission fluids, aggressive chemicals, and many acids. That behavior comes from the compound itself: Viton® (FKM) is valued for outstanding high-temperature capability and long service life in hot, chemically aggressive environments. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). Verify compatibility before use with ketones and esters or amines.

Maintenance and OEM teams specify it across automotive fuel systems, aerospace, and chemical processing.

Order part number VB75438, sold individually. Unit weight is approximately 40.594 g and nominal inside diameter is listed as 6 1/4 inch. Check the compound against your process media, pressure and temperature before committing to a design.