568-158 FLUOROSILICONE 70 DURO ORINGS

APG stocks the FS70158, an AS568-158 blue Fluorosilicone (FVMQ) 70 Shore A O-Ring built to an inside diameter of 4.737 in (120.32 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 4.943 in (125.55 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

The compound resists aromatic fuels and jet fuel, ozone and weathering, and extreme cold. That behavior comes from the compound itself: Fluorosilicone (FVMQ) is widely chosen for silicone's low-temperature flexibility combined with fuel resistance and good compression set resistance in static duty. Service temperature is rated from -80°F (-62.2°C) through 350°F (176.7°C).

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

FS70158 ships individually. Unit weight is approximately 3.2113 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.