3MM CS X 127MM ID BLACK BUNA 70D

H3X127 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 127 mm (5 in), a cross section of 3 mm (0.118 in), and an outside diameter of 133 mm (5.24 in). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies.

It resists many alcohols, propane and butane, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs and low compression set under sustained load. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C).

Typical settings include hydraulic and pneumatic systems, automotive, and agricultural equipment.

Order part number H3X127, sold individually. Unit weight is approximately 3.64 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.