Q-337 BUNA 70 Q RING

Ordered as QH70337, this is an AS568-337 black Buna-N (Nitrile) 70 Shore A Quad-Ring measuring an inside diameter of 2.975 in (75.57 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.395 in (86.23 mm). The quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

The material holds up against propane and butane, greases and lubricants, and water. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with polar solvents or strong acids. The profile itself contributes a parting line located away from the sealing surface and resistance to the spiral twisting that defeats round-section rings.

Maintenance and OEM teams specify it across general industrial maintenance, construction equipment, and fluid power.

QH70337 ships individually. Unit weight is approximately 7.568 g and nominal inside diameter is listed as 3 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.