2MM CS X 18MM ID BLACK BUNA 90D

Part number H90M2X18 is a black Buna-N (Nitrile) 90 Shore A O-Ring with an inside diameter of 18 mm (0.709 in), a cross section of 2 mm (0.079 in), and an outside diameter of 22 mm (0.87 in). An o-ring compresses into its gland to block fluid or gas migration across a joint.

It resists propane and butane, hydraulic fluids, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to ketones or strong acids will shorten service life.

It sees regular use in construction equipment, general industrial maintenance, and hydraulic and pneumatic systems.

Reference part number H90M2X18 when ordering; the item is sold individually. Unit weight is approximately 0.268 g. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.