Q-249 FLUOROELASTOMER 75 Q RING

This quad-ring is supplied in AS568-249 black Viton® (FKM) 75 Shore A built to an inside diameter of 4.859 in (123.42 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 5.137 in (130.48 mm), catalogued under part number QV70249. It seats in a standard o-ring gland while offering improved dynamic performance.

Viton® (FKM) is widely chosen for the industry benchmark where nitrile reaches its thermal limit, excellent resistance to compression set and permeation. Expect good resistance to engine and transmission fluids, aromatic hydrocarbons, and many acids. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). It should not be specified for service in ketones and esters or amines. The profile itself contributes two sealing bands per contact face rather than one and a parting line located away from the sealing surface.

Typical settings include automotive fuel systems, oil and gas, and aerospace.

QV70249 ships individually. Unit weight is approximately 8.0067 g and nominal inside diameter is listed as 4 7/8 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.