3.5MM CS X 21.7MM ID BLACK BUNA 90D

APG stocks the H90M3.5X21.7, a black Buna-N (Nitrile) 90 Shore A O-Ring supplied with an inside diameter of 21.7 mm (0.854 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 28.7 mm (1.13 in). An o-ring delivers dependable bidirectional sealing in a compact groove envelope. The catalog record notes: Metric O-RING, JIS P22A.

As a material, 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 propane and butane, water, and many alcohols. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Verify compatibility before use with ketones or polar solvents.

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

Reference part number H90M3.5X21.7 when ordering; the item is sold individually. Unit weight is approximately 1.065 g. 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.