4MM CS X 25MM ID BLACK FKM 75D

This o-ring is supplied in black Viton® (FKM) 75 Shore A built to an inside diameter of 25 mm (0.984 in), a cross section of 4 mm (0.157 in), and an outside diameter of 33 mm (1.3 in), catalogued under part number V4X25. It remains the most cost-effective sealing element available for pressurized assemblies.

Expect good resistance to engine and transmission fluids, petroleum oils and fuels, and many acids. That behavior comes from the compound itself: Viton® (FKM) is valued for the industry benchmark where nitrile reaches its thermal limit and long service life in hot, chemically aggressive environments. 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.

You will find this material specified across aerospace, semiconductor equipment, and oil and gas.

Stocked as V4X25 and sold individually. Unit weight is approximately 2.119 g. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.