The Bi-Metal Self-Drilling Screw offers high efficiency, corrosion resistance, and facilitates fast and easy installation

This R&D testing report introduces Taiwan Shan Yin Bi-Metal Self-Drilling Screw and its performance in drilling, tapping, fastening, corrosion resistance, and installation efficiency. The product is designed for metal roof mounting, sheet metal applications, solar panel mounting, and construction fastening projects where fast installation and stable drilling performance are important.

The Bi-Metal Self-Drilling Screw combines a stainless steel screw shank with an alloy steel drilling point. This structure supports corrosion resistance on the stainless steel shank while maintaining drilling and tapping performance through the alloy steel drill point.

Product Structure

• Stainless steel screw shank for corrosion resistance.
• Alloy steel drilling point for drilling and tapping performance.
• Strong welding point to connect the stainless steel shank and alloy steel drill point.
• Straight shank design to support stable drilling performance and reduce twist after drilling in the demonstrated comparison.

Drilling Performance

The Bi-Metal Self-Drilling Screw is designed for self-drilling through hard metal sheets up to 15 mm in the demonstrated application. Different drilling points may be selected according to metal thickness and fastening requirements.

By drilling, tapping, and fastening in one process, the Bi-Metal Self-Drilling Screw can help improve installation efficiency for metal fastening and roofing applications.

Comparative Test After Drilling

The comparative test after drilling shows the difference between TSY Bi-Metal Self-Drilling Screw and another brand's bi-metal screw. In the demonstrated comparison, the TSY bi-metal screw maintained a straight shank after drilling, while the other brand's bi-metal screw showed breakage due to twist after drilling.

• TSY Bi-Metal Self-Drilling Screw: straight shank after drilling.
• Other brand's bi-metal screw: broken by twist after drilling in the demonstrated comparison.

Application

• Corrugated roof mounting.
• Trapezoidal sheet metal roof mounting.
• Solar panel mounting.

Features and Benefits

• Self-drilling through hard metal sheet up to 15 mm in the demonstrated application.
• Fast and immediate installation by drilling, tapping, and fastening at one time.
• Strong stainless steel screw shank and welding point.
• Stainless steel shank supports corrosion resistance.
• Alloy steel drill point supports drilling and tapping performance.

This testing report demonstrates Taiwan Shan Yin's product testing approach for bi-metal self-drilling screws, stainless steel self-drilling screws, roofing screws, solar panel mounting screws, and metal fastening applications. Through drilling performance and comparative testing, buyers can better evaluate drilling stability, corrosion resistance, installation efficiency, and fastening suitability for metal roof and construction projects.