Q-440 BUNA 70 Q RING

The QH70440 is an AS568-440 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 6.725 in (170.82 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 7.275 in (184.79 mm). This quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

Expect good resistance to greases and lubricants, propane and butane, and many alcohols. Buna-N (Nitrile) is specified for strong abrasion and tear resistance, reliable performance in both static and dynamic service. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to ozone and direct sunlight or automotive brake fluid will shorten service life. The profile itself contributes a parting line located away from the sealing surface and resistance to the spiral twisting that defeats round-section rings.

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

This item is sold individually under part number QH70440. Unit weight is approximately 25.919 g. Review your operating media and conditions against this specification before installation.