BigBoltNut is a hot dip galvanised bolts supplier , manufacturer and exporter in India. These bolts are used in energy sector like wind, solar, thermal and hydro energy . Hot-dip galvanisation is a form of galvanisation. It is the process of coating iron, steel or aluminium with a thin zinc layer, by passing the metal through a molten bath of zinc at a temperature of around 860 °F (460 °C).