2MM CS X 21MM ID BLACK BUNA 90D

The H90M2X21 is a black Buna-N (Nitrile) 90 Shore A O-Ring with an inside diameter of 21 mm (0.827 in), a cross section of 2 mm (0.079 in), and an outside diameter of 25 mm (0.98 in). This o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Buna-N (Nitrile) is specified here for most widely specified general-purpose sealing elastomer and low compression set under sustained load. Expect good resistance to greases and lubricants, hydraulic fluids, and many alcohols. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to ketones or automotive brake fluid will shorten service life.

It sees regular use in construction equipment, general industrial maintenance, and fluid power.

Stocked as H90M2X21 and sold individually. Unit weight is approximately 0.3272 g. Review your operating media and conditions against this specification before installation.