-257 BLACK FKM 90D O-RING

Ordered as V90257, this is an AS568-257 black Viton® (FKM) 90 Shore A O-Ring supplied with an inside diameter of 5.859 in (148.82 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 6.137 in (155.88 mm). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.

Viton® (FKM) is known for the industry benchmark where nitrile reaches its thermal limit and very low compression set at elevated temperature. The compound resists aggressive chemicals, many acids, and chlorinated solvents. Service temperature is rated from -15°F (-26.1°C) through 400°F (204.4°C). Exposure to amines or ketones and esters will shorten service life.

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

This item is sold individually under part number V90257. Unit weight is approximately 8.4873 g and nominal inside diameter is listed as 5 7/8 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.