2MM CS X 78MM ID BLACK BUNA 70D

The H2X78 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 78 mm (3.071 in), a cross section of 2 mm (0.079 in), and an outside diameter of 82 mm (3.23 in). This o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

As a material, Buna-N (Nitrile) delivers strong abrasion and tear resistance, low compression set under sustained load. This material stands up to propane and butane, petroleum-based oils, and many alcohols. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving automotive brake fluid or ketones call for a different compound.

You will find this material specified across agricultural equipment, general industrial maintenance, and fluid power.

Order part number H2X78, sold individually. Unit weight is approximately 0.9743 g. Check the compound against your process media, pressure and temperature before committing to a design. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.