3.1MM CS X 139.4MM ID BLACK BUNA 70D

Ordered as H3.1X139.4, this is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 139.4 mm (5.488 in), a cross section of 3.1 mm (0.122 in), and an outside diameter of 145.6 mm (5.73 in). The o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load. Additional detail on this item: Metric O-RING, JIS G140.

Buna-N (Nitrile) is specified here for most widely specified general-purpose sealing elastomer and low compression set under sustained load. The compound resists many alcohols, petroleum-based oils, and greases and lubricants. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It is not the right choice where polar solvents or automotive brake fluid are present.

Typical settings include construction equipment, general industrial maintenance, and agricultural equipment.

H3.1X139.4 ships individually. Unit weight is approximately 4.1069 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. For a size or compound outside the standard catalog, APG can quote from a print or sample.