*568-283 FLUOROSILICONE 70 DURO ORINGS

Part number FS70283 is an AS568-283 blue Fluorosilicone (FVMQ) 70 Shore A O-Ring built to an inside diameter of 16.955 in (430.66 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 17.233 in (437.72 mm). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Expect good resistance to petroleum oils, chlorinated solvents, and ozone and weathering. That behavior comes from the compound itself: Fluorosilicone (FVMQ) is widely chosen for silicone's low-temperature flexibility combined with fuel resistance and the standard choice for static aerospace fuel system seals. Service temperature is rated from -80°F (-62.2°C) through 350°F (176.7°C). Applications involving brake fluids or hydrazine call for a different compound.

You will find this material specified across high-altitude equipment, aerospace and defense, and aviation fuel systems.

Reference part number FS70283 when ordering; the item is sold individually. Unit weight is approximately 20.863 g and nominal inside diameter is listed as 17 inch. Check the compound against your process media, pressure and temperature before committing to a design.