1.8MM CS X 2.8MM ID BLACK BUNA 70D

H1.8X2.8 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 2.8 mm (0.11 in), a cross section of 1.8 mm (0.071 in), and an outside diameter of 6.4 mm (0.25 in). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies.

Expect good resistance to hydraulic fluids, petroleum-based oils, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is known for low compression set under sustained load, strong abrasion and tear resistance. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving ozone and direct sunlight or ketones call for a different compound.

It sees regular use in agricultural equipment, construction equipment, and automotive.

H1.8X2.8 ships individually. Unit weight is approximately 0.0457 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.