Q-027 BUNA 70 Q RING

Ordered as QH70027, this is an AS568-027 black Buna-N (Nitrile) 70 Shore A Quad-Ring built to an inside diameter of 1.301 in (33.05 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.441 in (36.6 mm). The quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.

Buna-N (Nitrile) delivers strong abrasion and tear resistance, low compression set under sustained load. The material holds up against petroleum-based oils, hydraulic fluids, and propane and butane. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). The profile itself contributes lower compressive load required to achieve a seal and two sealing bands per contact face rather than one.

You will find this material specified across agricultural equipment, construction equipment, and general industrial maintenance.

Stocked as QH70027 and sold individually. Unit weight is approximately 0.3469 g and nominal inside diameter is listed as 1 5/16 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.