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: made of carbon steel like as 1018,1045,1022 and so on.
Surface finish: black phosphate, white zince,Hot dip Galvanized.
Our screw widely used in various industrial area.