Part number H5X72 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 72 mm (2.835 in), a cross section of 5 mm (0.197 in), and an outside diameter of 82 mm (3.23 in). An o-ring compresses into its gland to block fluid or gas migration across a joint.
As a material, Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. The material holds up against greases and lubricants, many alcohols, and hydraulic fluids. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Verify compatibility before use with automotive brake fluid or strong acids.
Maintenance and OEM teams specify it across construction equipment, automotive, and fluid power.
Stocked as H5X72 and sold individually. Unit weight is approximately 5.8203 g. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
Description 5MM CS X 72MM ID BLACK BUNA 70D
Actual Outside Diameter 82 mm (3.23 inch)
Actual Cross Section 5 mm (0.197 inch)
Actual Inside Diameter 72 mm (2.835 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity