-391 BROWN FKM 75D O-RING

The VB75391 is an AS568-391 brown Viton® (FKM) 75 Shore A O-Ring measuring 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). This o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

The material holds up against chlorinated solvents, engine and transmission fluids, and many acids. Viton® (FKM) offers outstanding high-temperature capability, excellent resistance to compression set and permeation. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). Applications involving ketones and esters or low-molecular-weight organic acids call for a different compound.

It sees regular use in aerospace, semiconductor equipment, and high-temperature process equipment.

Order part number VB75391, sold individually. Unit weight is approximately 78.96 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.