4MM CS X 85MM ID BLACK BUNA 90D

Part number H90M4X85 is a black Buna-N (Nitrile) 90 Shore A O-Ring built to an inside diameter of 85 mm (3.346 in), a cross section of 4 mm (0.157 in), and an outside diameter of 93 mm (3.66 in). An o-ring compresses into its gland to block fluid or gas migration across a joint.

As a material, Buna-N (Nitrile) is valued for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. This material stands up to water, propane and butane, and petroleum-based oils. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving automotive brake fluid or ketones call for a different compound.

Common environments for this compound include fluid power, general industrial maintenance, and construction equipment.

Stocked as H90M4X85 and sold individually. As always, verify media compatibility and operating conditions against the requirements of your specific application. For a size or compound outside the standard catalog, APG can quote from a print or sample.