568-221 FLUOROSILICONE 70 DURO ORINGS

This o-ring is supplied in AS568-221 blue Fluorosilicone (FVMQ) 70 Shore A supplied with an inside diameter of 1.421 in (36.09 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.699 in (43.15 mm), catalogued under part number FS70221. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Fluorosilicone (FVMQ) is specified here for standard choice for static aerospace fuel system seals and good compression set resistance in static duty. Expect good resistance to petroleum oils, chlorinated solvents, and extreme cold. Published continuous service range is -80°F (-62.2°C) to 350°F (176.7°C). It should not be specified for service in brake fluids or hydrazine.

Common environments for this compound include aerospace and defense, military ground vehicles, and high-altitude equipment.

Reference part number FS70221 when ordering; the item is sold individually. Unit weight is approximately 1.9321 g and nominal inside diameter is listed as 1 7/16 inch. 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.