**568-040 FLUOROSILICONE 70 DURO ORING

Ordered as FS70040, this is an AS568-040 blue Fluorosilicone (FVMQ) 70 Shore A O-Ring measuring an inside diameter of 2.864 in (72.75 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 3.004 in (76.3 mm). The o-ring compresses into its gland to block fluid or gas migration across a joint.

The compound resists aromatic fuels and jet fuel, chlorinated solvents, and ozone and weathering. That behavior comes from the compound itself: Fluorosilicone (FVMQ) is known for the standard choice for static aerospace fuel system seals, excellent ozone and UV stability. Service temperature is rated from -80°F (-62.2°C) through 350°F (176.7°C). Verify compatibility before use with hydrazine or brake fluids.

Typical settings include aerospace and defense, high-altitude equipment, and military ground vehicles.

Reference part number FS70040 when ordering; the item is sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.