APG stocks the H1X39, a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 39 mm (1.535 in), a cross section of 1 mm (0.039 in), and an outside diameter of 41 mm (1.61 in). An o-ring compresses into its gland to block fluid or gas migration across a joint.
It resists petroleum-based oils, water, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) delivers low compression set under sustained load, strong abrasion and tear resistance. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).
Typical settings include agricultural equipment, general industrial maintenance, and fluid power.
Stocked as H1X39 and sold individually. Unit weight is approximately 0.122 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. 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 1MM CS X 39MM ID BLACK BUNA 70D
Actual Outside Diameter 41 mm (1.61 inch)
Actual Cross Section 1 mm (0.039 inch)
Actual Inside Diameter 39 mm (1.535 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity