BIG BOLT NUT is an ISO 9001 : 2015, 14001: 2015 and 45001: 2018 Certified Company. We are manufacturing high tensile bolts & fasteners in bigger diameter bolt nuts & HV grade hot dip galvanised fasteners, We are the biggest manufacturers in India for bigger diameter bolts & nuts in high tensile and stainless steel grade and fasteners to major contractors and consultants undertaking these projects in India, USA, Europe, Asia, Africa and Middle east region in power, renewable energy, wind & infrastructure division We are also specialised manufacturers for stainless steel Hex bolts, nuts, Stud bolts and washers which are used in water treatment, sewage treatment, waste water treatment and desalination plants. We specialise is manufacturing and exporting High tensile bolts & fasteners in 8.8, 10.9 and 12.9 grade and Stainless steel bolt in SS A4, A4-50, A4-70, SS 304, SS 316, SS 316L, 316S31 grades & bolts & nuts.