4MM CS X 126MM ID BLACK BUNA 70D

APG stocks the H4X126, a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 126 mm (4.961 in), a cross section of 4 mm (0.157 in), and an outside diameter of 134 mm (5.28 in). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

The compound resists petroleum-based oils, greases and lubricants, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to ozone and direct sunlight or polar solvents will shorten service life.

It sees regular use in automotive, hydraulic and pneumatic systems, and agricultural equipment.

H4X126 ships individually. Unit weight is approximately 6.2678 g. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.