Since 1989, BIG BOLT NUT, an ISO 9001 certified firm, has been producing bolts and nuts in stainless steel, carbon steel, alloy steel, and high tensile grade and high tensile fasteners. We are specialized manufacturers for high tensile bolts and nuts in 8.8, 10.9, and 12.9 grade for the power, energy, and renewable sector like wind and solar energy. We also manufacture stainless steel bolts and nuts in SS 304, SS 316, SS 316L, and 316S31 grade for the marine, water, and sewage treatment industry. We manufacture bigger diameter bolts and nuts from M-20 to M-72 and in inches and Unc from 3/4" to 3". Our production facility spans 40,000 square feet. ft space, and we're situated outside of New Delhi.