We are India’s leading manufacturers of HSFG washers, offering F436 hardened flat washers for use with high strength bolts and external threaded fasteners. Made of medium carbon steel, these washers are either through hardened or carburized to provide superior mechanical strength. The washers are usually used in conjunction with ASTM A325 high strength bolts and A563 heavy hex nuts. In addition to these products, we also manufacture and export spring washers, rectangular washers, square washers, special purpose washers, conical washers, pack washers, high tensile washers, industrial washers, anti theft nuts, pal nuts, carriage bolts, hex bolts, and hex screws – all for the international market.