Q-312 FLUOROELASTOMER 75 Q RING

Part number QV70312 is an AS568-312 black Viton® (FKM) 75 Shore A Quad-Ring built to an inside diameter of 0.6 in (15.24 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.02 in (25.91 mm). A quad-ring delivers lower friction and better sealing stability than a comparable round-section o-ring.

It resists many acids, engine and transmission fluids, and chlorinated solvents. Viton® (FKM) offers very low compression set at elevated temperature, excellent resistance to compression set and permeation. Service temperature is rated from -15°F (-26.1°C) through 400°F (204.4°C). Verify compatibility before use with low-molecular-weight organic acids or amines. The profile itself contributes a parting line located away from the sealing surface and resistance to the spiral twisting that defeats round-section rings.

Maintenance and OEM teams specify it across high-temperature process equipment, chemical processing, and aerospace.

QV70312 ships individually. Nominal inside diameter is listed as 5/8 inch. Application requirements vary, so validate compatibility with your process conditions prior to 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.