Ordered as H70254, this is an AS568-254 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 5.484 in (139.29 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 5.762 in (146.35 mm). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.
It resists greases and lubricants, propane and butane, and water. Buna-N (Nitrile) is specified for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in polar solvents or ketones.
Maintenance and OEM teams specify it across hydraulic and pneumatic systems, fluid power, and construction equipment.
Order part number H70254, sold individually. Unit weight is approximately 5.466 g. Check the compound against your process media, pressure and temperature before committing to a design. For a size or compound outside the standard catalog, APG can quote from a print or sample.
Description -254 BLACK BUNA 70D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 5.484 inch (139.29 mm)
Actual Outside Diameter 5.762 inch (146.35 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity