3MM CS X 177MM ID BLACK BUNA 70D

APG stocks the H3X177, a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 177 mm (6.969 in), a cross section of 3 mm (0.118 in), and an outside diameter of 183 mm (7.2 in). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

Expect good resistance to water, propane and butane, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is known for low compression set under sustained load, reliable performance in both static and dynamic service. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ketones or polar solvents.

You will find this material specified across agricultural equipment, general industrial maintenance, and automotive.

This item is sold individually under part number H3X177. Unit weight is approximately 4.8817 g. Application requirements vary, so validate compatibility with your process conditions prior to installation.