*568-028 FLUOROSILICONE 70 DURO ORING

Ordered as FS70028, this is an AS568-028 blue Fluorosilicone (FVMQ) 70 Shore A O-Ring measuring an inside diameter of 1.364 in (34.65 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.504 in (38.2 mm). The o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

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

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

Order part number FS70028, sold individually. Nominal inside diameter is listed as 1 3/8 inch. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.