-340 BROWN FKM 90D O-RING

Ordered as VB90340, this is an AS568-340 brown Viton® (FKM) 90 Shore A O-Ring measuring an inside diameter of 3.35 in (85.09 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.77 in (95.76 mm). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.

The compound resists chlorinated solvents, aggressive chemicals, and petroleum oils and fuels. That behavior comes from the compound itself: Viton® (FKM) is known for the industry benchmark where nitrile reaches its thermal limit and very low compression set at elevated temperature. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). Verify compatibility before use with low-molecular-weight organic acids or ketones and esters.

Common environments for this compound include aerospace, semiconductor equipment, and chemical processing.

Stocked as VB90340 and sold individually. Unit weight is approximately 14.154 g. Check the compound against your process media, pressure and temperature before committing to a design. 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.