4.5MM CS X 89MM ID BLACK FKM 75D

APG stocks the V4.5X89, a black Viton® (FKM) 75 Shore A O-Ring supplied with an inside diameter of 89 mm (3.504 in), a cross section of 4.5 mm (0.177 in), and an outside diameter of 98 mm (3.86 in). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

The material holds up against engine and transmission fluids, aromatic hydrocarbons, and chlorinated solvents. That behavior comes from the compound itself: Viton® (FKM) is known for very low compression set at elevated temperature 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). It should not be specified for service in hot water and steam or low-molecular-weight organic acids.

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

Stocked as V4.5X89 and sold individually. 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.