We manufacture high strength friction grip, HSFG bolts and nuts in plain carbon steel and alloy steel through controlled heating and forging conditions. We provide heat treatment to the bolts and nuts in sealed quench furnaces to achieve excellent properties. These structural, high tensile HSFG bolts and nuts are meant for higher bearing stresses, and are offered in the following range: Diameters from 12 mm to 42 mm Lenghts from 30 mm to 450 mm Plain, Phosphated, Zinc plated finishes