5.3MM CS X 63MM ID BLACK BUNA 70D

H5.3X63 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 63 mm (2.48 in), a cross section of 5.3 mm (0.209 in), and an outside diameter of 73.6 mm (2.9 in). In service, this o-ring compresses into its gland to block fluid or gas migration across a joint.

The compound resists many alcohols, water, and propane and butane. Buna-N (Nitrile) offers low compression set under sustained load, strong abrasion and tear resistance. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where strong acids or ketones are present.

Maintenance and OEM teams specify it across general industrial maintenance, agricultural equipment, and automotive.

H5.3X63 ships individually. Unit weight is approximately 5.8772 g. Check the compound against your process media, pressure and temperature before committing to a design.