2MM CS X 77MM ID BLACK BUNA 70D

APG stocks the H2X77, a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 77 mm (3.031 in), a cross section of 2 mm (0.079 in), and an outside diameter of 81 mm (3.19 in). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

As a material, Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. This material stands up to petroleum-based oils, hydraulic fluids, and propane and butane. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where ozone and direct sunlight or automotive brake fluid are present.

Maintenance and OEM teams specify it across hydraulic and pneumatic systems, fluid power, and agricultural equipment.

Order part number H2X77, sold individually. Unit weight is approximately 0.975 g. As always, verify media compatibility and operating conditions against the requirements of your specific application.