-247 BLACK BUNA 70D O-RING

The H70MD247 is an AS568-247 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 4.609 in (117.07 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.887 in (124.13 mm). This o-ring remains the most cost-effective sealing element available for pressurized assemblies.

This material stands up to many alcohols, greases and lubricants, and water. That behavior comes from the compound itself: Buna-N (Nitrile) is known for low compression set under sustained load, strong abrasion and tear resistance. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving automotive brake fluid or ketones call for a different compound.

The compound is metal detectable for HACCP and foreign-body control programs. Typical settings include automotive, construction equipment, and fluid power.

Reference part number H70MD247 when ordering; the item is sold individually. Nominal inside diameter is listed as 4 5/8 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.