Q-428 FLUOROELASTOMER 75 Q RING

Ordered as QV70428, this is an AS568-428 black Viton® (FKM) 75 Shore A Quad-Ring built to an inside diameter of 4.85 in (123.19 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.4 in (137.16 mm). The quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

The material holds up against aggressive chemicals, chlorinated solvents, and many acids. Viton® (FKM) delivers long service life in hot, chemically aggressive environments and outstanding high-temperature capability. Continuous operating temperature is published at -15°F (-26.1°C) to 400°F (204.4°C). Verify compatibility before use with hot water and steam or low-molecular-weight organic acids. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and lower compressive load required to achieve a seal.

Maintenance and OEM teams specify it across automotive fuel systems, aerospace, and chemical processing.

This item is sold individually under part number QV70428. Unit weight is approximately 31.983 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.