-343 BROWN FKM 90D O-RING

The VB90343 is an AS568-343 brown Viton® (FKM) 90 Shore A O-Ring supplied with an inside diameter of 3.725 in (94.62 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.145 in (105.28 mm). This o-ring remains the most cost-effective sealing element available for pressurized assemblies.

Expect good resistance to many acids, aggressive chemicals, and petroleum oils and fuels. That behavior comes from the compound itself: Viton® (FKM) is widely chosen for the industry benchmark where nitrile reaches its thermal limit and very low compression set at elevated temperature. Continuous operating temperature is published at -15°F (-26.1°C) to 400°F (204.4°C).

You will find this material specified across aerospace, automotive fuel systems, and oil and gas.

Stocked as VB90343 and sold individually. Unit weight is approximately 15.7804 g and nominal inside diameter is listed as 3 3/4 inch. Check the compound against your process media, pressure and temperature before committing to a design. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.