3.5MM CS X 21.7MM ID BLACK FKM 75D

The V3.5X21.7 is a black Viton® (FKM) 75 Shore A O-Ring supplied with an inside diameter of 21.7 mm (0.854 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 28.7 mm (1.13 in). This o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load. This item is further identified as Metric O-RING, JIS P22A.

Expect good resistance to aromatic hydrocarbons, engine and transmission fluids, and chlorinated solvents. That behavior comes from the compound itself: Viton® (FKM) is valued for outstanding high-temperature capability and the industry benchmark where nitrile reaches its thermal limit. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). Applications involving low-molecular-weight organic acids or amines call for a different compound.

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

V3.5X21.7 ships individually. Unit weight is approximately 1.4042 g. 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.