-345 BROWN FKM 90D O-RING

APG stocks the VB90345, an AS568-345 brown Viton® (FKM) 90 Shore A O-Ring with an inside diameter of 3.975 in (100.97 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.395 in (111.63 mm). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

As a material, Viton® (FKM) is widely chosen for excellent resistance to compression set and permeation, very low compression set at elevated temperature. The material holds up against chlorinated solvents, many acids, and petroleum oils and fuels. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). It should not be specified for service in amines or ketones and esters.

Typical settings include semiconductor equipment, aerospace, and chemical processing.

Reference part number VB90345 when ordering; the item is sold individually. Unit weight is approximately 16.413 g and nominal inside diameter is listed as 4 inch. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.