4MM CS X 305MM ID BLACK BUNA 70D

The H4X305 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 305 mm (12.008 in), a cross section of 4 mm (0.157 in), and an outside diameter of 313 mm (12.32 in). This o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

As a material, Buna-N (Nitrile) is known for low compression set under sustained load, reliable performance in both static and dynamic service. Expect good resistance to greases and lubricants, propane and butane, and petroleum-based oils. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving strong acids or ozone and direct sunlight call for a different compound.

Typical settings include agricultural equipment, automotive, and fluid power.

Reference part number H4X305 when ordering; the item is sold individually. Unit weight is approximately 15.009 g. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.