Self-tapping screw material can be divided into carbon steel and stainless steel two kinds, its medium carbon steel material is usually mainly used in 1022 medium carbon steel. Usually used on doors and windows, iron sheets. The head is a bearing surface formed at one end. For thread forming and thread cutting self-tapping screws (self-tapping screws), the flat head is buried down (Flat? Countersunk), flat round head (Oval Countersunk), disc head (Pan), hexagonal and hexagon hua silk head (Hex and Hex washer Head) is the most important, these five head types account for almost 90% of all self-attack screws, using self-attack screws (self-attack screws) should first consider this.1. Our company will adhere to "Quality first, perfection forever, people-oriented, technology innovation"business philosophy. Hard work to keep making progress, innovation in the industry, make every effort to first-class enterprise. We try our best to build the scientific management model, to learn abundant professional knowledge, to develop advanced production equipment and production process, to create the first-call quality products, reasonable price, high quality of service, quick delivery, to give you create new value. 2. Since always, we adhering to the "open and fair, share to get, the pursuit of excellence, and creation of value"values, adhere to the"integrity and efficient, trade-oriented, best way, best valve" business philosophy. Together with our all over the world have branches and partners to develop new business areas, maximum common values. We sincerely welcome and together we share in global resources, opening up new career together with the chapter. 3. We have a dedicated and aggressive sales team, and many branches, catering to our customers. We are looking for long-term business partnerships, and ensure our suppliers that they will definitely benefit in both short and long run.