Udyog includes making products like nut bolts, which are used to join materials. There are different types of nut bolts such as hex bolts, carriage bolts, and eye bolts. Also, there are many types of nuts and bolts like hex nuts and lock nuts. The nut bolt HSN code helps in trade and tax identification. The nut and bolt difference is that a bolt has threads, while a nut fits on it to hold things tightly.
