Part number V1.78X138.94 is a black Viton® (FKM) 75 Shore A O-Ring measuring an inside diameter of 138.94 mm (5.47 in), a cross section of 1.78 mm (0.07 in), and an outside diameter of 142.5 mm (5.61 in). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.
Viton® (FKM) is known for outstanding high-temperature capability and very low compression set at elevated temperature. The material holds up against chlorinated solvents, many acids, and aromatic hydrocarbons. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). It should not be specified for service in ketones and esters or hot water and steam.
Common environments for this compound include high-temperature process equipment, oil and gas, and aerospace.
Order part number V1.78X138.94, sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
Description 1.78MM CS X 138.94MM ID BLACK FKM 75D
Actual Outside Diameter 142.5 mm (5.61 inch)
Actual Cross Section 1.78 mm (0.07 inch)
Actual Inside Diameter 138.94 mm (5.47 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity