4MM CS X 12MM ID BLACK BUNA 70D

Part number H4X12 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 12 mm (0.472 in), a cross section of 4 mm (0.157 in), and an outside diameter of 20 mm (0.79 in). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

This material stands up to water, petroleum-based oils, and propane and butane. Buna-N (Nitrile) is specified for low compression set under sustained load, reliable performance in both static and dynamic service. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to strong acids or automotive brake fluid will shorten service life.

Typical settings include construction equipment, fluid power, and hydraulic and pneumatic systems.

Reference part number H4X12 when ordering; the item is sold individually. Unit weight is approximately 0.771 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.