3.55MM CS X 77.5MM ID BLACK BUNA 70D

H3.55X77.5 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 77.5 mm (3.051 in), a cross section of 3.55 mm (0.14 in), and an outside diameter of 84.6 mm (3.33 in). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

As a material, Buna-N (Nitrile) is valued for low compression set under sustained load and an economical choice for high-volume maintenance programs. It resists hydraulic fluids, greases and lubricants, and propane and butane. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where automotive brake fluid or ketones are present.

You will find this material specified across construction equipment, automotive, and general industrial maintenance.

H3.55X77.5 ships individually. Unit weight is approximately 3.0376 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.