Q-156 BUNA 70 Q RING

QH70156 is an AS568-156 black Buna-N (Nitrile) 70 Shore A Quad-Ring measuring an inside diameter of 4.237 in (107.62 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 4.443 in (112.85 mm). In service, this quad-ring provides a dual sealing band on each contact face for improved reliability.

Buna-N (Nitrile) is specified here for low compression set under sustained load, strong abrasion and tear resistance. The material holds up against propane and butane, hydraulic fluids, and greases and lubricants. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where polar solvents or ozone and direct sunlight are present. The profile itself contributes lower compressive load required to achieve a seal and resistance to the spiral twisting that defeats round-section rings.

It sees regular use in hydraulic and pneumatic systems, automotive, and fluid power.

Stocked as QH70156 and sold individually. Unit weight is approximately 2.1917 g. Application requirements vary, so validate compatibility with your process conditions prior to installation.