Duplex Ferro Fasteners, ASME B18.2.1 Hex Bolts ASME B18.2.2 Hex Nuts ASME B18.22.1, Stud Bolt, Hex Bolt, Hex Bolt cum partiali filo, Hex Bolt cum filo pleno, Threaded Rod, U-Bolt, Hex Socket Cap Screw, Hex Nut, Flatline / ^ - Zhen Equip Hong Pup. Ltd.