3MM CS X 139MM ID BLACK BUNA 70D

APG stocks the H3X139, a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 139 mm (5.472 in), a cross section of 3 mm (0.118 in), and an outside diameter of 145 mm (5.71 in). An o-ring delivers dependable bidirectional sealing in a compact groove envelope.

The material holds up against propane and butane, many alcohols, and petroleum-based oils. Buna-N (Nitrile) is valued for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving automotive brake fluid or strong acids call for a different compound.

Common environments for this compound include general industrial maintenance, agricultural equipment, and construction equipment.

H3X139 ships individually. Unit weight is approximately 3.83 g. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.