Dongguan Biodi Hardware Products Co., Ltd. specializes in the production of drilling screws, self-tapping screws, stainless steel drilling screws, self-tapping screws (SUS410, SUS304, SUS316),5 tail drilling screws and other products. Product type: Clamp ear drill tail, hexagonal large flange, hexagonal small washers, round head Washers (large flat head), round head, flat head (salad head), horn head, Weihua head, hill head, flowering head, cup head hex. Product specifications: 4#, 6#, 7#, 8#, 10#, 12#, 14#. Electroplating categories: blue zinc, blue white zinc, wucai zinc, phosphating (gray phosphorus/black phosphorus), nickel plating, dacron rust, heat through treasure and so on; DIN7504 series drilling screws produced by the company are widely used in steel structure construction projects, high-rise buildings, large and medium-sized plant steel frame and civil construction, metallurgical plant, heavy port machinery and other engineering fields, can tap aluminum plate, color tile, iron plate, household appliances, furniture, doors and Windows.