3.5MM CS X 72MM ID BLACK BUNA 70D

H3.5X72 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 72 mm (2.835 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 79 mm (3.11 in). In service, this o-ring delivers dependable bidirectional sealing in a compact groove envelope.

This material stands up to petroleum-based oils, greases and lubricants, and water. Buna-N (Nitrile) delivers low compression set under sustained load and an economical choice for high-volume maintenance programs. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving strong acids or ozone and direct sunlight call for a different compound.

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

Stocked as H3.5X72 and sold individually. Unit weight is approximately 2.803 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.