3.1MM CS X 99.4MM ID BLACK BUNA 70D

This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 99.4 mm (3.913 in), a cross section of 3.1 mm (0.122 in), and an outside diameter of 105.6 mm (4.16 in), catalogued under part number H3.1X99.4. It compresses into its gland to block fluid or gas migration across a joint. Source specification: Metric O-RING, JIS G100.

This material stands up to petroleum-based oils, many alcohols, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) offers strong abrasion and tear resistance, the most widely specified general-purpose sealing elastomer. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving automotive brake fluid or ozone and direct sunlight call for a different compound.

Typical settings include general industrial maintenance, construction equipment, and fluid power.

This item is sold individually under part number H3.1X99.4. Unit weight is approximately 3.038 g. Check the compound against your process media, pressure and temperature before committing to a design.