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Ningbo Xinfeng Machinery IndustrialCo., Ltd., adheres to the quality orientation, with an annual production of more than 5,000 tons of various types of coated screws, and more than 20,000 tons of various types of self-drilling screws for heat treatment andwe can produce 380mmSelf-Drilling screws.Xinfeng, established in 1998 and located in Cixi City, Ningbo, is an industrial and trade enterprise specializing in design, research and development, production and sales. Our company integrates the processes of cold heading, drilling, thread rolling, heat treatment, Zn-Al coating treatment, and provides high-performance, time-saving, labor-saving and high-strength screws in accordance with the AS3566 standard for curtain walls, animal husbandry, heavy steel structures, light steel houses, solar photovoltaic and other industries.

Long self-drilling screws(Length to 380); Truss head wood-construction screws.No.5 Self drilling screws; Coated screws; As3566.1 self-drilling; Hex washer head self-drilling screws; Hex flange head self-drilling screws; Modified truss head self-drilling screws; Pan head self-drilling screws, Countersunk head self-drilling screws; Bulge head self-drilling screws;