Q-210 BUNA 70 Q RING

APG stocks the QH70210, an AS568-210 black Buna-N (Nitrile) 70 Shore A Quad-Ring supplied with an inside diameter of 0.734 in (18.64 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.012 in (25.7 mm). A quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

It resists water, many alcohols, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where strong acids or ozone and direct sunlight are present. The profile itself contributes a parting line located away from the sealing surface and lower compressive load required to achieve a seal.

Common environments for this compound include construction equipment, agricultural equipment, and automotive.

Reference part number QH70210 when ordering; the item is sold individually. Unit weight is approximately 0.892 g and nominal inside diameter is listed as 3/4 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.