Q-151 BUNA 70 Q RING

This quad-ring is supplied in AS568-151 black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 2.987 in (75.87 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 3.193 in (81.1 mm), catalogued under part number QH70151. It seats in a standard o-ring gland while offering improved dynamic performance.

As a material, Buna-N (Nitrile) is known for reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. This material stands up to propane and butane, hydraulic fluids, and water. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to polar solvents or ozone and direct sunlight will shorten service life. 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 construction equipment, general industrial maintenance, and agricultural equipment.

Reference part number QH70151 when ordering; the item is sold individually. Unit weight is approximately 1.5907 g and nominal inside diameter is listed as 3 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. 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.