Simmonds Marshall Ltd. engages in the manufacture and sale of specialized nylon insert self locking nuts and other special fasteners. Its products include Cleveloc and all metal self locking, dome cap, wheel, castle and slotted, hose pipe fitting, flange, cage, weld, and u-nuts; bolts and studs; and cold forged sleeves, bushes collars, and spacers. The company was founded on April 16, 1960 and is headquartered in Mumbai, India.