Q-370 FLUOROELASTOMER 75 Q RING

This quad-ring is supplied in AS568-370 black Viton® (FKM) 75 Shore A with an inside diameter of 8.225 in (208.92 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 8.645 in (219.58 mm), catalogued under part number QV70370. It uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

Viton® (FKM) is specified here for outstanding high-temperature capability and very low compression set at elevated temperature. It resists engine and transmission fluids, chlorinated solvents, and aggressive chemicals. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). The profile itself contributes two sealing bands per contact face rather than one and resistance to the spiral twisting that defeats round-section rings.

Maintenance and OEM teams specify it across aerospace, automotive fuel systems, and semiconductor equipment.

Reference part number QV70370 when ordering; the item is sold individually. Unit weight is approximately 28.57 g. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.