*Q-459 BUNA 70 Q RING

This quad-ring is supplied in AS568-459 black Buna-N (Nitrile) 70 Shore A with an inside diameter of 14.975 in (380.37 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 15.525 in (394.34 mm), catalogued under part number QH70459. It delivers lower friction and better sealing stability than a comparable round-section o-ring.

Buna-N (Nitrile) is widely chosen for reliable performance in both static and dynamic service, low compression set under sustained load. Expect good resistance to greases and lubricants, many alcohols, and propane and butane. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with strong acids or ketones. The profile itself contributes lower compressive load required to achieve a seal and two sealing bands per contact face rather than one.

Maintenance and OEM teams specify it across agricultural equipment, hydraulic and pneumatic systems, and fluid power.

Order part number QH70459, sold individually. Nominal inside diameter is listed as 15 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. 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.