**568-391 FLUOROSILICONE 70 DURO ORING

This o-ring is supplied in AS568-391 blue Fluorosilicone (FVMQ) 70 Shore A supplied with an inside diameter of 21.953 in (557.61 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 22.373 in (568.27 mm), catalogued under part number FS70391. It delivers dependable bidirectional sealing in a compact groove envelope.

Expect good resistance to ozone and weathering, extreme cold, and aromatic fuels and jet fuel. That behavior comes from the compound itself: Fluorosilicone (FVMQ) is specified for a very wide service temperature range and the standard choice for static aerospace fuel system seals. The material carries a published service range of -80°F (-62.2°C) to 350°F (176.7°C). Verify compatibility before use with ketones or hydrazine.

Typical settings include aviation fuel systems, high-altitude equipment, and military ground vehicles.

FS70391 ships individually. Review your operating media and conditions against this specification before installation.