568-376 FLUOROSILICONE 70 DURO ORINGS

FS70376 is an AS568-376 blue Fluorosilicone (FVMQ) 70 Shore A O-Ring with an inside diameter of 9.725 in (247.02 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 10.145 in (257.68 mm). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies.

This material stands up to aromatic fuels and jet fuel, chlorinated solvents, and extreme cold. That behavior comes from the compound itself: Fluorosilicone (FVMQ) is known 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). It is not the right choice where brake fluids or high-temperature dynamic service are present.

It sees regular use in high-altitude equipment, aviation fuel systems, and military ground vehicles.

Order part number FS70376, sold individually. Unit weight is approximately 25.737 g and nominal inside diameter is listed as 9 3/4 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.