3.55MM CS X 21.2MM ID BLACK BUNA 70D

Part number H3.55X21.2 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 21.2 mm (0.835 in), a cross section of 3.55 mm (0.14 in), and an outside diameter of 28.3 mm (1.11 in). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Buna-N (Nitrile) is widely chosen for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. This material stands up to greases and lubricants, propane and butane, and hydraulic fluids. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to automotive brake fluid or ozone and direct sunlight will shorten service life.

It sees regular use in hydraulic and pneumatic systems, agricultural equipment, and construction equipment.

This item is sold individually under part number H3.55X21.2. Unit weight is approximately 0.9426 g. Check the compound against your process media, pressure and temperature before committing to a design.