3MM CS X 74MM ID BLACK BUNA 70D

Part number H3X74 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 74 mm (2.913 in), a cross section of 3 mm (0.118 in), and an outside diameter of 80 mm (3.15 in). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

The compound resists propane and butane, many alcohols, 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, strong abrasion and tear resistance. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to ketones or strong acids will shorten service life.

Maintenance and OEM teams specify it across construction equipment, fluid power, and automotive.

This item is sold individually under part number H3X74. Unit weight is approximately 2.1486 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.