This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 59 mm (2.323 in), a cross section of 3 mm (0.118 in), and an outside diameter of 65 mm (2.56 in), catalogued under part number H3X59. It delivers dependable bidirectional sealing in a compact groove envelope.
The material holds up against hydraulic fluids, many alcohols, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is known for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).
It sees regular use in construction equipment, automotive, and general industrial maintenance.
This item is sold individually under part number H3X59. Unit weight is approximately 1.6814 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.
Description 3MM CS X 59MM ID BLACK BUNA 70D
Actual Outside Diameter 65 mm (2.56 inch)
Actual Cross Section 3 mm (0.118 inch)
Actual Inside Diameter 59 mm (2.323 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity