3.5MM CS X 21.7MM ID BLACK BUNA 70D

Part number H3.5X21.7 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to 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.

It resists greases and lubricants, propane and butane, and many alcohols. Buna-N (Nitrile) is specified for low compression set under sustained load and an economical choice for high-volume maintenance programs. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).

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

Order part number H3.5X21.7, sold individually. Unit weight is approximately 0.9441 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.