This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 3.91 mm (0.154 in), a cross section of 1.27 mm (0.05 in), and an outside diameter of 6.45 mm (0.25 in), catalogued under part number H1.27X3.91. It compresses into its gland to block fluid or gas migration across a joint.
As a material, Buna-N (Nitrile) is specified for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. The compound resists propane and butane, hydraulic fluids, and greases and lubricants. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).
You will find this material specified across fluid power, automotive, and hydraulic and pneumatic systems.
H1.27X3.91 ships individually. 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.
Description 1.27MM CS X 3.91MM ID BLACK BUNA 70D
Actual Outside Diameter 6.45 mm (0.25 inch)
Actual Cross Section 1.27 mm (0.05 inch)
Actual Inside Diameter 3.91 mm (0.154 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity