4MM CS X 71MM ID BLACK BUNA 70D

Part number H4X71 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 71 mm (2.795 in), a cross section of 4 mm (0.157 in), and an outside diameter of 79 mm (3.11 in). An o-ring compresses into its gland to block fluid or gas migration across a joint.

This material stands up to petroleum-based oils, many alcohols, and hydraulic fluids. Buna-N (Nitrile) delivers an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where automotive brake fluid or ozone and direct sunlight are present.

Maintenance and OEM teams specify it across hydraulic and pneumatic systems, general industrial maintenance, and fluid power.

Reference part number H4X71 when ordering; the item is sold individually. Unit weight is approximately 3.626 g. Check the compound against your process media, pressure and temperature before committing to a design.