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Their hardened drill tip allows them to penetrate metal sheets and simultaneously form matching threads, eliminating the need for pre-drilling or tapping, significantly improving installation efficiency. The primary surface treatment used in the production of self-drilling metal screws is plating, with options such as silver-white zinc, colored zinc, and black phosphating, ensuring they withstand 500-1000 hours of salt spray testing and long-term use. Special coatings, such as Delta Seal® (for electrochemical corrosion protection), are also available for use in specialized environments. Self-drilling metal screws are primarily constructed of carbon steel, coated with zinc, Dacromet®, or Geomet® for rust and corrosion resistance and cost-effectiveness. They are also available in two stainless steel options: 304 and 316, making them ideal for use in high-humidity or chemical environments.
Self-drilling metal screws are an efficient and reliable option, their integrated self-drilling and self-tapping capabilities addressing the pain points of traditional backing plate installation. The core function of backing plates is to enhance structural stability, provide load-bearing support, or provide protection. When fastening to a metal substrate is required, self-drilling metal screws perfectly meet the requirements of "penetrating the metal layer and quickly securing."
For a backing plate + metal stud assembly, traditional processes require self-drilling holes in the stud before fastening with conventional self-tapping screws. This process is cumbersome and prone to installation misalignment due to drilling deviation. Self-drilling metal screws, however, offer a 12-15mm drill tail that can directly penetrate the 1.2mm backing plate + 4mm steel stud, eliminating the need for pre-drilling. Their coarse thread provides a tight engagement with the stud, offering a pullout strength of 1800-2500N, meeting the curtain wall's wind and seismic requirements.
What are the applications for self-drilling metal screws? Since they don't require pre-drilling, their application focuses on metal-to-metal connections, making them particularly suitable for applications requiring efficient installation, reliable fastening, and handling complex environments.
High-efficiency outdoor fastening
Fastening galvanized color-coated steel sheets and aluminum-magnesium-manganese alloy roof panels to aluminum alloy secondary studs significantly improves installation efficiency compared to the traditional "drilling, tapping, and bolting" process. This eliminates the need to carry drilling tools, reducing the risk of working at height.
Fastening curtain wall backing panels to metal hangers requires a balance between waterproofing, corrosion resistance, and structural stability. Self-drilling metal screws address the difficulty of pre-drilling curtain wall studs and eliminate the risk of electrochemical corrosion during use.
Metal connections in high-temperature environments
Connecting machine tool exterior shields to equipment steel frames requires resistance to the high-frequency vibrations experienced during machine tool processing. Choose self-drilling metal screws with carbon steel hexagon socket flange heads, which can withstand temperatures up to 300℃ and offer a long service life.
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