-351 BROWN FKM 90D O-RING

Part number VB90351 is an AS568-351 brown Viton® (FKM) 90 Shore A O-Ring built to an inside diameter of 4.725 in (120.02 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 5.145 in (130.68 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

As a material, Viton® (FKM) is valued for long service life in hot, chemically aggressive environments and the industry benchmark where nitrile reaches its thermal limit. This material stands up to aromatic hydrocarbons, chlorinated solvents, and many acids. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). Verify compatibility before use with amines or low-molecular-weight organic acids.

Common environments for this compound include high-temperature process equipment, oil and gas, and semiconductor equipment.

Order part number VB90351, sold individually. Unit weight is approximately 19.399 g and nominal inside diameter is listed as 4 3/4 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. 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.