5.7MM CS X 55.6MM ID BLACK BUNA 90D

H90M5.7X55.6 is a black Buna-N (Nitrile) 90 Shore A O-Ring measuring an inside diameter of 55.6 mm (2.189 in), a cross section of 5.7 mm (0.224 in), and an outside diameter of 67 mm (2.64 in). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load. Source specification: Metric O-RING, JIS P56.

As a material, Buna-N (Nitrile) delivers an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. It resists many alcohols, propane and butane, and water. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with ketones or ozone and direct sunlight.

Maintenance and OEM teams specify it across fluid power, automotive, and hydraulic and pneumatic systems.

Reference part number H90M5.7X55.6 when ordering; the item is sold individually. Unit weight is approximately 6.7465 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.