1.78MM CS X 253.59MM ID BLACK FKM 75D

APG stocks the V1.78X253.59, a black Viton® (FKM) 75 Shore A O-Ring with an inside diameter of 253.59 mm (9.984 in), a cross section of 1.78 mm (0.07 in), and an outside diameter of 257.15 mm (10.12 in). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Viton® (FKM) is specified here for excellent resistance to compression set and permeation, outstanding high-temperature capability. It resists petroleum oils and fuels, aggressive chemicals, and chlorinated solvents. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). Applications involving ketones and esters or low-molecular-weight organic acids call for a different compound.

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

Order part number V1.78X253.59, sold individually. Review your operating media and conditions against this specification before installation.