U-Bolt M16 x120 mm Thread, 184 mm Inside Diam, 272 mm Inside Height Galvanised Nuts not included with this item Graphskill standard U-Bolt Galvanised - A duller finish than BZP, typically 50 microns thick covering of Zinc and therefore provides much more protection suitable for many out door applications All Measurements in mm Inside Diameter : 184 Inside Height : 272 Leg Centers : 200 Leg Length : 180 Material : Galvanised Pipe Nominal Bore : Suggested Pipe OD : 182 Thread length : 120 Thread Size : M16 Our manufacturing tolerances are + / - 1 mm) We use roll threading so the diameter of the bar is usually less than the thread size. Please ask if unsure If using your own nuts on galvanised products please ensure they are tapped oversize to allow for the galvanised layer