4MM CS X 42MM ID BLACK FKM 75D

This o-ring is supplied in black Viton® (FKM) 75 Shore A with an inside diameter of 42 mm (1.654 in), a cross section of 4 mm (0.157 in), and an outside diameter of 50 mm (1.97 in), catalogued under part number V4X42. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

The material holds up against engine and transmission fluids, aromatic hydrocarbons, and many acids. That behavior comes from the compound itself: Viton® (FKM) delivers the industry benchmark where nitrile reaches its thermal limit and very low compression set at elevated temperature. Service temperature is rated from -15°F (-26.1°C) through 400°F (204.4°C). Applications involving hot water and steam or low-molecular-weight organic acids call for a different compound.

Maintenance and OEM teams specify it across high-temperature process equipment, semiconductor equipment, and aerospace.

Stocked as V4X42 and sold individually. Unit weight is approximately 3.3039 g. Application requirements vary, so validate compatibility with your process conditions prior to installation.