This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 71 mm (2.795 in), a cross section of 1.5 mm (0.059 in), and an outside diameter of 74 mm (2.91 in), catalogued under part number H1.5X71. It compresses into its gland to block fluid or gas migration across a joint.
It resists greases and lubricants, propane and butane, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for low compression set under sustained load, strong abrasion and tear resistance. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where polar solvents or strong acids are present.
It sees regular use in fluid power, hydraulic and pneumatic systems, and agricultural equipment.
Order part number H1.5X71, sold individually. Unit weight is approximately 0.498 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.
Description 1.5MM CS X 71MM ID BLACK BUNA 70D
Actual Outside Diameter 74 mm (2.91 inch)
Actual Cross Section 1.5 mm (0.059 inch)
Actual Inside Diameter 71 mm (2.795 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity