Ordered as H5.7X134.3, this is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 134.3 mm (5.287 in), a cross section of 5.7 mm (0.224 in), and an outside diameter of 145.7 mm (5.74 in). The o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.
Buna-N (Nitrile) delivers an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. This material stands up to petroleum-based oils, hydraulic fluids, and water. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C).
It sees regular use in hydraulic and pneumatic systems, agricultural equipment, and general industrial maintenance.
H5.7X134.3 ships individually. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.
Description 5.7MM CS X 134.3MM ID BLACK BUNA 70D
Actual Outside Diameter 145.7 mm (5.74 inch)
Actual Cross Section 5.7 mm (0.224 inch)
Actual Inside Diameter 134.3 mm (5.287 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity