-121 BROWN FKM 90D O-RING

Part number VB90121 is an AS568-121 brown Viton® (FKM) 90 Shore A O-Ring supplied with an inside diameter of 1.049 in (26.64 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.255 in (31.88 mm). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Expect good resistance to aggressive chemicals, chlorinated solvents, and engine and transmission fluids. That behavior comes from the compound itself: Viton® (FKM) is valued for long service life in hot, chemically aggressive environments, excellent resistance to compression set and permeation. Rated temperature range runs from -15°F (-26.1°C) to 400°F (204.4°C) in continuous service. Verify compatibility before use with ketones and esters or amines.

Maintenance and OEM teams specify it across automotive fuel systems, high-temperature process equipment, and aerospace.

Order part number VB90121, sold individually. Unit weight is approximately 1.0837 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.