APG stocks the H8X104, a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 104 mm (4.094 in), a cross section of 8 mm (0.315 in), and an outside diameter of 120 mm (4.72 in). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.
It resists propane and butane, water, and petroleum-based oils. Buna-N (Nitrile) is valued for strong abrasion and tear resistance, reliable performance in both static and dynamic service. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C).
Typical settings include fluid power, agricultural equipment, and general industrial maintenance.
Stocked as H8X104 and sold individually. Unit weight is approximately 21.6 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. 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 8MM CS X 104MM ID BLACK BUNA 70D
Actual Outside Diameter 120 mm (4.72 inch)
Actual Cross Section 8 mm (0.315 inch)
Actual Inside Diameter 104 mm (4.094 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity