When fasteners vibrate, spring washers are utilized to provide stability and flexibility to bolts and nuts. Locking washers: these are usually spring washers that stop the fastening device from unscrewing and causing loosening or fastening. We manufacture these washers in carbon steel, stainless steel, and mild steel. MS, HV 100, HV 200, HV 300, SS304, SS316, and so on are popular grades. The International Standard ISO 7089 specifies the dimensions for these. The company BIG BOLT NUT manufactures and exports larger diameter bolts, nuts, and washers. For crucial applications such as wind energy, infrastructure, pipe lines, sewage plants, pumps, valves, bridges, water treatment plants, TSE networks, and more, we produce stud bolts in high tensile and stainless steel grades. Manufacturing process for spring washers is very different from bolts & nuts, the raw material for spring washers are generally available in coil form and these are made from special purpose de coiler machines which make them as per specifications.