4MM CS X 21MM ID BLACK FKM 75D

V4X21 is a black Viton® (FKM) 75 Shore A O-Ring supplied with an inside diameter of 21 mm (0.827 in), a cross section of 4 mm (0.157 in), and an outside diameter of 29 mm (1.14 in). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Viton® (FKM) is valued for long service life in hot, chemically aggressive environments, excellent resistance to compression set and permeation. The compound resists engine and transmission fluids, petroleum oils and fuels, and aromatic hydrocarbons. Service temperature is rated from -15°F (-26.1°C) through 400°F (204.4°C). Verify compatibility before use with amines or hot water and steam.

Typical settings include automotive fuel systems, high-temperature process equipment, and chemical processing.

This item is sold individually under part number V4X21. Unit weight is approximately 1.8285 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.