-427 BLACK FKM 90D O-RING

This o-ring is supplied in AS568-427 black Viton® (FKM) 90 Shore A built to an inside diameter of 4.725 in (120.02 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.275 in (133.99 mm), catalogued under part number V90427. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

This material stands up to aromatic hydrocarbons, many acids, and petroleum oils and fuels. That behavior comes from the compound itself: Viton® (FKM) delivers very low compression set at elevated temperature and long service life in hot, chemically aggressive environments. Service temperature is rated from -15°F (-26.1°C) through 400°F (204.4°C).

Maintenance and OEM teams specify it across oil and gas, chemical processing, and aerospace.

Order part number V90427, sold individually. Unit weight is approximately 27.675 g and nominal inside diameter is listed as 4 3/4 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.