Q-345 FLUOROELASTOMER 75 Q RING

APG stocks the QV70345, an AS568-345 black Viton® (FKM) 75 Shore A Quad-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). A quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

This material stands up to engine and transmission fluids, chlorinated solvents, and petroleum oils and fuels. That behavior comes from the compound itself: Viton® (FKM) is widely chosen for excellent resistance to compression set and permeation, long service life in hot, chemically aggressive environments. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). The profile itself contributes a parting line located away from the sealing surface and lower compressive load required to achieve a seal.

Typical settings include high-temperature process equipment, automotive fuel systems, and semiconductor equipment.

Stocked as QV70345 and sold individually. Unit weight is approximately 14.786 g and nominal inside diameter is listed as 4 inch. Check the compound against your process media, pressure and temperature before committing to a design.