3.1MM CS X 129.4MM ID BLACK BUNA 70D

Ordered as H3.1X129.4, this is a black Buna-N (Nitrile) 70 Shore A O-Ring built to 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). The o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces. The catalog record notes: Metric O-RING, JIS G130.

As a material, Buna-N (Nitrile) is specified for reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. The material holds up against greases and lubricants, propane and butane, and hydraulic fluids. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to strong acids or automotive brake fluid will shorten service life.

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

Order part number H3.1X129.4, sold individually. Unit weight is approximately 3.7548 g. As always, verify media compatibility and operating conditions against the requirements of your specific application.