Alloy Steel Alloy Grade B16 Coupling Nut, Gr. B16 Lock Nut, ASTM A193 Alloy Steel Gr. B16 Fender Washer, Alloy Steel Gr. B16 Threaded Stud, ASME SA193 Alloy Gr. B16 Bolts and Screws, Alloy Steel Gr. B16 Star Washer, Gr. B16 Alloy Hex Head Fasteners, Alloy Steel Gr. B16 Lag Bolted Joints.