Q-363 FLUOROELASTOMER 75 Q RING

This quad-ring is supplied in AS568-363 black Viton® (FKM) 75 Shore A measuring an inside diameter of 6.475 in (164.47 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 6.895 in (175.13 mm), catalogued under part number QV70363. It provides a dual sealing band on each contact face for improved reliability.

It resists chlorinated solvents, many acids, and aggressive chemicals. That behavior comes from the compound itself: Viton® (FKM) offers excellent resistance to compression set and permeation, the industry benchmark where nitrile reaches its thermal limit. Rated temperature range runs from -15°F (-26.1°C) to 400°F (204.4°C) in continuous service. It is not the right choice where ketones and esters or amines are present. The profile itself contributes two sealing bands per contact face rather than one and lower compressive load required to achieve a seal.

Maintenance and OEM teams specify it across chemical processing, aerospace, and oil and gas.

Reference part number QV70363 when ordering; the item is sold individually. Unit weight is approximately 24.358 g and nominal inside diameter is listed as 6 1/2 inch. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.