Haiyan Guantang Hardware & Machinery Factory (GTHM) specializes in producing nuts, threaded rods, and bolts. We have introduced thirty sets of advanced technical nut manufacturing equipment. Furthermore, our products are manufactured strictly according to the standards of GB (national standard), ISO (international), DIN (Germany), and BS (Britain). Therefore, our products are of high quality and beautifully packing.Our products meet the standard and non-standard fasteners of ISO, DIN, ASTM, ANSI (IFI) and BS, widely used in various industries including construction, electronic and...