1MM CS X 21MM ID BLACK FKM 75D

Part number V1X21 is a black Viton® (FKM) 75 Shore A O-Ring built to an inside diameter of 21 mm (0.827 in), a cross section of 1 mm (0.039 in), and an outside diameter of 23 mm (0.91 in). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

It resists chlorinated solvents, aromatic hydrocarbons, and engine and transmission fluids. That behavior comes from the compound itself: Viton® (FKM) is valued for long service life in hot, chemically aggressive environments and the industry benchmark where nitrile reaches its thermal limit. Rated temperature range runs from -15°F (-26.1°C) to 400°F (204.4°C) in continuous service. Applications involving amines or ketones and esters call for a different compound.

It sees regular use in automotive fuel systems, high-temperature process equipment, and semiconductor equipment.

V1X21 ships individually. Unit weight is approximately 0.1011 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.