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.
Description 1.78MM CS X 253.59MM ID BLACK FKM 75D
Actual Outside Diameter 257.15 mm (10.12 inch)
Actual Cross Section 1.78 mm (0.07 inch)
Actual Inside Diameter 253.59 mm (9.984 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity