8.4MM CS X 339.5MM ID BLACK FKM 70D

The V8.4X339.5 is a black Viton® (FKM) 70 Shore A O-Ring supplied with an inside diameter of 339.5 mm (13.366 in), a cross section of 8.4 mm (0.331 in), and an outside diameter of 356.3 mm (14.03 in). This o-ring remains the most cost-effective sealing element available for pressurized assemblies. The catalog record notes: Metric O-RING, JIS P340.

Viton® (FKM) is specified here for industry benchmark where nitrile reaches its thermal limit and long service life in hot, chemically aggressive environments. The material holds up against petroleum oils and fuels, chlorinated solvents, and aggressive chemicals. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). Exposure to hot water and steam or low-molecular-weight organic acids will shorten service life.

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

This item is sold individually under part number V8.4X339.5. Unit weight is approximately 110.87 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.