Q-109 BUNA 70 Q RING

This quad-ring is supplied in AS568-109 black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 0.299 in (7.59 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 0.505 in (12.83 mm), catalogued under part number QH70109. It delivers lower friction and better sealing stability than a comparable round-section o-ring.

Buna-N (Nitrile) is specified here for strong abrasion and tear resistance, most widely specified general-purpose sealing elastomer. The material holds up against petroleum-based oils, water, and hydraulic fluids. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving ozone and direct sunlight or polar solvents call for a different compound. The profile itself contributes lower compressive load required to achieve a seal and a parting line located away from the sealing surface.

It sees regular use in automotive, agricultural equipment, and fluid power.

Reference part number QH70109 when ordering; the item is sold individually. Unit weight is approximately 0.2039 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.