5MM CS X 66MM ID BLACK FKM 75D

V5X66 is a black Viton® (FKM) 75 Shore A O-Ring built to an inside diameter of 66 mm (2.598 in), a cross section of 5 mm (0.197 in), and an outside diameter of 76 mm (2.99 in). In service, this o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Viton® (FKM) is specified here for excellent resistance to compression set and permeation, industry benchmark where nitrile reaches its thermal limit. The material holds up against chlorinated solvents, aromatic hydrocarbons, and engine and transmission fluids. Continuous operating temperature is published at -15°F (-26.1°C) to 400°F (204.4°C). Applications involving low-molecular-weight organic acids or ketones and esters call for a different compound.

Maintenance and OEM teams specify it across high-temperature process equipment, oil and gas, and automotive fuel systems.

Stocked as V5X66 and sold individually. Unit weight is approximately 8.1375 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.