HEBEI DASAI Fasteners Manufacturing Co., Ltd is a leading and professional manufacturer and supplier of various fasteners such as hex bolts,hex nuts, Steel structure bolts,Plain washers, Spring washers, threaded rods, Welding stud,anchor bolts, expansion anchors, and screws, etc. We are also capable of producing non-standard fasteners according to customers drawing or sample. Also stamping and welded products with extensive industry application. Meanwhile, we can do head markings to meet customers needs. The main product standards: DIN, GB, ANSI/ASTM, JIS, ISO.