2MM CS X 143MM ID BLACK BUNA 70D

APG stocks the H2X143, a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 143 mm (5.63 in), a cross section of 2 mm (0.079 in), and an outside diameter of 147 mm (5.79 in). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

The material holds up against propane and butane, hydraulic fluids, and water. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for low compression set under sustained load, reliable performance in both static and dynamic service. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving automotive brake fluid or ozone and direct sunlight call for a different compound.

Maintenance and OEM teams specify it across fluid power, general industrial maintenance, and automotive.

H2X143 ships individually. Unit weight is approximately 1.7667 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.