V3.53X25.8 is a black Viton® (FKM) 75 Shore A O-Ring built to an inside diameter of 25.8 mm (1.016 in), a cross section of 3.53 mm (0.139 in), and an outside diameter of 32.86 mm (1.29 in). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies.
The compound resists aggressive chemicals, engine and transmission fluids, and chlorinated solvents. That behavior comes from the compound itself: Viton® (FKM) is widely chosen for outstanding high-temperature capability 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). Exposure to ketones and esters or amines will shorten service life.
It sees regular use in high-temperature process equipment, semiconductor equipment, and aerospace.
This item is sold individually under part number V3.53X25.8. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
Description 3.53MM CS X 25.8MM ID BLACK FKM 75D
Actual Outside Diameter 32.86 mm (1.29 inch)
Actual Cross Section 3.53 mm (0.139 inch)
Actual Inside Diameter 25.8 mm (1.016 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity