APG stocks the H5.7X59.2, a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 59.2 mm (2.331 in), a cross section of 5.7 mm (0.224 in), and an outside diameter of 70.6 mm (2.78 in). An o-ring compresses into its gland to block fluid or gas migration across a joint.
The compound resists petroleum-based oils, water, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving polar solvents or ketones call for a different compound.
It sees regular use in agricultural equipment, construction equipment, and general industrial maintenance.
Order part number H5.7X59.2, sold individually. Unit weight is approximately 0.0064 g. Check the compound against your process media, pressure and temperature before committing to a design. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.
Description 5.7MM CS X 59.2MM ID BLACK BUNA 70D
Actual Outside Diameter 70.6 mm (2.78 inch)
Actual Cross Section 5.7 mm (0.224 inch)
Actual Inside Diameter 59.2 mm (2.331 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity