3.1MM CS X 129.4MM ID BLACK BUNA 90D

Part number H90M3.1X129.4 is a black Buna-N (Nitrile) 90 Shore A O-Ring measuring an inside diameter of 129.4 mm (5.094 in), a cross section of 3.1 mm (0.122 in), and an outside diameter of 135.6 mm (5.34 in). An o-ring remains the most cost-effective sealing element available for pressurized assemblies. Supplementary detail from the product record: Metric O-RING, JIS G130.

The material holds up against many alcohols, water, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) offers low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C).

It sees regular use in construction equipment, agricultural equipment, and automotive.

Stocked as H90M3.1X129.4 and sold individually. Unit weight is approximately 4.3169 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.