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Hex Head Self-Drilling Screws

Hex Head Self-Drilling Screws

Hex head self-drilling screws, commonly known as hex flange drill-point screws, are high-strength, integrated fasteners designed for heavy-duty metal fastening. Conforming to the GB/T 15856.5 national standard, they integrate drilling, tapping, and fastening into a single operation, eliminating the need for pre-drilling and allowing for one-step panel installation.

The core feature of this product is its integrated external hex flange head. The head boasts a standard, precise hexagonal structure with high hardness, making it compatible with various tools such as sockets, electric wrenches, and ratchet wrenches. It provides uniform stress distribution and high torque-bearing capacity, ensuring it does not slip or break during installation, making it better suited for high-power fastening tasks than cross-recessed pan-head screws. The underside of the hex head features a widened, integrated flange that disperses clamping pressure, preventing the deformation of thin steel plates under load. When used with a matching waterproof rubber washer, it provides sealing and waterproofing for roof joints, serving the multiple functions of limiting, pressure-bearing, and waterproofing.

The shank is equipped with a specialized cutting drill point that meets strict hardness requirements, allowing it to penetrate various thicknesses of metal plates directly and automatically tap and lock the threads. The products are available in a variety of materials, including zinc-plated carbon steel, 410 stainless steel, and 304/316 stainless steel, to suit different working conditions ranging from standard indoor use to outdoor and coastal corrosion-resistant environments. Offering excellent vibration resistance, stability against loosening, and convenient installation and removal, these screws are widely used for connecting metal components in steel-structure workshops, color-steel roofing, photovoltaic mounting systems, light-gauge steel keels, and curtain wall ducting, making them the mainstream fastening accessory for industrial construction and steel-structure engineering.

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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