Ordered as H1.6X3.1, this is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 3.1 mm (0.122 in), a cross section of 1.6 mm (0.063 in), and an outside diameter of 6.3 mm (0.25 in). The o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.
Buna-N (Nitrile) offers strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. Expect good resistance to petroleum-based oils, propane and butane, and greases and lubricants. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It should not be specified for service in automotive brake fluid or ketones.
Maintenance and OEM teams specify it across fluid power, hydraulic and pneumatic systems, and general industrial maintenance.
Order part number H1.6X3.1, sold individually. Unit weight is approximately 0.0369 g. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.
Description 1.6MM CS X 3.1MM ID BLACK BUNA 70D
Actual Outside Diameter 6.3 mm (0.25 inch)
Actual Cross Section 1.6 mm (0.063 inch)
Actual Inside Diameter 3.1 mm (0.122 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity