3.5MM CS X 75MM ID BLACK BUNA 70D

H3.5X75 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 75 mm (2.953 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 82 mm (3.23 in). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

It resists petroleum-based oils, propane and butane, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is known for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C).

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

Stocked as H3.5X75 and sold individually. Unit weight is approximately 2.88 g. Check the compound against your process media, pressure and temperature before committing to a design. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.