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Countersunk Head Self-Drilling Screws

Countersunk Head Self-Drilling Screws

Countersunk self-drilling screws are specialized metal fasteners that integrate drilling, tapping, and fastening into one operation. Their core feature is a standard 90° tapered countersunk head paired with an integrated quenched drill point. This design eliminates the need for pre-drilling or matching nuts, allowing for the direct fastening of thin-walled metal materials such as galvanized steel sheets, aluminum, and light-gauge steel.

The head features an inverted conical structure that fits standard 90° countersunk chamfers. Once tightened, the screw head sits completely embedded within the material, with the top surface flush against the workpiece, ensuring a smooth, protrusion-free, and scratch-resistant finish. Compared to pan-head or round-head self-drilling screws, the countersunk style offers superior aesthetics and adaptability. It does not occupy external space and will not interfere with subsequent processes such as panel sliding, cladding, or painting. The tapered surface ensures uniform stress distribution, providing enhanced fastening stability.

Typically manufactured from case-hardened zinc-plated steel or 304 stainless steel for rust resistance and durability, these screws allow for efficient and labor-saving installation using standard power drills. They are widely used in fastening applications that require high surface flatness, such as electrical enclosures, light-gauge steel ceilings, decorative sheet metal, appliance panels, automotive interiors, and aluminum alloy profile assembly.

About Us
Anhui Linghong Hardware Technology Co., Ltd.

Anhui Linghong Hardware Technology Co., Ltd. was founded in 2017, covering an area of 30 mu with 12,600 square meters of standardized workshops and office buildings. Formerly known as Shanghai Linghong Fasteners Co., Ltd., the company has inherited its core management and production backbone team, and follows the mature operation system formed through 16 years of steady development of Shanghai Linghong.
The company is equipped with more than 80 sets of production equipment, with a stable monthly capacity of approximately 500 tons. It specializes in the production of a full range of screws, including wood screws, chipboard screws, drywall screws, self-drilling screws, self-tapping screws, plasterboard screws, wallboard screws, corrugated screws, and other products. The company has a professional-quality management team and is equipped with precision testing instruments, including metallographic polishing machines and Rockwell hardness testers. Through strict control over first-piece inspection, in-process inspection, and the whole ex-factory process, it ensures the qualified quality of each batch of products with strong quality inspection capabilities. Meanwhile, the company has established a complete packaging system and an experienced management team, adopting a production model of "intelligent and mechanized production as the mainstay, supplemented by manual work". Adhering to excellent quality and a good reputation, the company provides customers with cost-effective, high-quality products.
With over 20 years of deep engagement in the fastener industry, Anhui Linghong Hardware Technology Co., Ltd. upholds the business philosophy of "Quality First, Integrity-Based", and is a comprehensive enterprise integrating design, development, production, and sales. Relying on over 20 years of accumulated production management experience and foreign trade export strength, the company has passed ISO 9001 Quality Management System, ISO 14001 Environmental Management System, and ISO 45001 Occupational Health and Safety Management System certifications, and established mature overseas sales channels. At present, the company exports 40 to 50 containers to Australia and about 10 containers to Europe and Japan every month, with annual sales exceeding 200 million RMB. The company sincerely welcomes customers at home and abroad to contact us for business negotiations and win-win cooperation!

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