3.5MM CS X 67MM ID BLACK BUNA 70D

Ordered as H3.5X67, this is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 67 mm (2.638 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 74 mm (2.91 in). The o-ring compresses into its gland to block fluid or gas migration across a joint.

It resists petroleum-based oils, hydraulic fluids, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for reliable performance in both static and dynamic service, 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 ozone and direct sunlight or ketones are present.

You will find this material specified across fluid power, agricultural equipment, and general industrial maintenance.

Reference part number H3.5X67 when ordering; the item is sold individually. Unit weight is approximately 2.669 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.