8.4MM CS X 279.5MM ID BLACK FKM 70D

The V8.4X279.5 is a black Viton® (FKM) 70 Shore A O-Ring built to an inside diameter of 279.5 mm (11.004 in), a cross section of 8.4 mm (0.331 in), and an outside diameter of 296.3 mm (11.67 in). This o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces. Source specification: Metric O-RING, JIS P280.

The material holds up against petroleum oils and fuels, aromatic hydrocarbons, and chlorinated solvents. Viton® (FKM) is known for outstanding high-temperature capability and the industry benchmark where nitrile reaches its thermal limit. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). Applications involving ketones and esters or hot water and steam call for a different compound.

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

V8.4X279.5 ships individually. Unit weight is approximately 92.685 g. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.