Q-318 BUNA 70 Q RING

Ordered as QH70318, this is an AS568-318 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 0.975 in (24.77 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.395 in (35.43 mm). The quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

This material stands up to many alcohols, hydraulic fluids, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to polar solvents or automotive brake fluid will shorten service life. The profile itself contributes a parting line located away from the sealing surface and two sealing bands per contact face rather than one.

You will find this material specified across general industrial maintenance, hydraulic and pneumatic systems, and construction equipment.

Stocked as QH70318 and sold individually. Unit weight is approximately 2.731 g. Review your operating media and conditions against this specification before installation.