-244 BLACK BUNA 70D O-RING

Part number H70244 is an AS568-244 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 4.234 in (107.54 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.512 in (114.6 mm). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Expect good resistance to many alcohols, propane and butane, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) delivers low compression set under sustained load and an economical choice for high-volume maintenance programs. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving ketones or automotive brake fluid call for a different compound.

You will find this material specified across fluid power, general industrial maintenance, and hydraulic and pneumatic systems.

Reference part number H70244 when ordering; the item is sold individually. Unit weight is approximately 4.17 g and nominal inside diameter is listed as 4 1/4 inch. Review your operating media and conditions against this specification before installation. 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.