3.1MM CS X 134.4MM ID BLACK BUNA 70D

The H3.1X134.4 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 134.4 mm (5.291 in), a cross section of 3.1 mm (0.122 in), and an outside diameter of 140.6 mm (5.54 in). This 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 G135.

It resists greases and lubricants, propane and butane, and many alcohols. Buna-N (Nitrile) is specified for an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

Maintenance and OEM teams specify it across construction equipment, fluid power, and automotive.

Order part number H3.1X134.4, sold individually. Unit weight is approximately 4.0349 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.