Product: Washer Head Self-tapping Screws
Spec.: M2.9/M3.5/M4.2/M5.5
Length: 9.5–50mm (full sizes available)
Surface Finish: Blue-white Zinc Plated
Packing: Cartons, woven bags, pallets
Product Details
High Construction Efficiency, Time and Labor Saving
Self-drilling screws come with an integrated drill bit structure, requiring no pre-drilling. Drilling, tapping and fastening can be completed in one step. They are especially suitable for large-area projects such as color steel tiles, photovoltaic brackets and curtain walls, greatly reducing labor and equipment costs.
Firm Connection, Stable and Durable
Adopting thread and dovetail engagement structure, the screws feature excellent pull-out resistance and shear resistance. They maintain high pre-tightening force after fastening, with strong wind and seismic resistance. They are not easy to loosen during long-term outdoor use, ensuring long-term stability and reliability of engineering projects.
Premium Material, Rustproof and Long-lasting
Made of 1022/SWRCH22A carbon steel with carburizing and quenching treatment, balancing high hardness and good toughness. Multiple anti-corrosion coatings such as galvanizing and Dacromet are available, with salt spray resistance reaching 72–500 hours. Excellent rust resistance enables adaptation to humid, outdoor and other harsh environments.
Wide Compatibility, Multi-scene Application
Applicable to 0.5–6mm thin metal sheets, color steel tiles, light steel keels, ventilation ducts, billboards and more. Widely used in home decoration, industry and outdoor engineering. Complete specifications fully meet various construction requirements.
OUR STRENGTHS
Production Capacity
The company covers an area of 40,000 square meters with over 300 employees, achieving an annual output of more than 20,000 tons each for self-drilling screws and hot-dip galvanized bolts, capable of standard supply and customized special-shaped fastener production.
Production Equipment
It is equipped with over 200 sets of advanced Taiwan-origin self-drilling screw production equipment and 6 numerical control production lines, featuring advanced hardware configuration and high automated production level.
Quality Control
Following the ISO9001:2015 quality management system, the company has built a complete quality inspection laboratory and implements strict full-process quality control and testing from raw materials to finished products.
Certifications
The enterprise has obtained a number of industry honors and national 3A-level quality and integrity brand certification, holding industry status as the Vice Chairman Unit of Hebei Fastener Association and Executive Director Unit of relevant national chambers of commerce.
OUR STRENGTHS
Production Capacity
The company covers an area of 40,000 square meters with over 300 employees, achieving an annual output of more than 20,000 tons each for self-drilling screws and hot-dip galvanized bolts, capable of standard supply and customized special-shaped fastener production.
Production Equipment
It is equipped with over 200 sets of advanced Taiwan-origin self-drilling screw production equipment and 6 numerical control production lines, featuring advanced hardware configuration and high automated production level.
Quality Control
Following the ISO9001:2015 quality management system, the company has built a complete quality inspection laboratory and implements strict full-process quality control and testing from raw materials to finished products.
Certifications
The enterprise has obtained a number of industry honors and national 3A-level quality and integrity brand certification, holding industry status as the Vice Chairman Unit of Hebei Fastener Association and Executive Director Unit of relevant national chambers of commerce.
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