-440 BROWN FKM 90D O-RING

This o-ring is supplied in AS568-440 brown Viton® (FKM) 90 Shore A with an inside diameter of 6.725 in (170.82 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 7.275 in (184.79 mm), catalogued under part number VB90440. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

This material stands up to aggressive chemicals, petroleum oils and fuels, and engine and transmission fluids. That behavior comes from the compound itself: Viton® (FKM) offers excellent resistance to compression set and permeation, very low compression set at elevated temperature. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C).

Maintenance and OEM teams specify it across aerospace, oil and gas, and chemical processing.

Stocked as VB90440 and sold individually. Unit weight is approximately 47.173 g. Review your operating media and conditions against this specification before installation. 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.