SDMP fasteners( screw or bolt) through below process make it with high strength and good ductility performance.
Raw material→Phosphate washing→Head forming→Thread rolling→Heat treatment→plating→Sampling inspection→paking→Delivery
Description: 
Meterial: carbon steel like as 1018,1045,1022 and so on.
Surface finish: black phosphate, white zince,Hot dip Galvanized.
Usage:widely used in various industrial area.                                     
Tags: bolt, non-standard fasteners, nuts, screws, washer