Welding Screws

Do you have this problem? You need to put a screw on one side of a metal sheet. But the other side is out of reach. Regular screws cannot work. Our Welding Screws solve this problem. They go directly onto the metal sheet. They use resistance welding or projection welding. We are a Shanghai factory. We have made fasteners for 20 years.

We weld an M6 welding screw on a 1.5 mm thick SPCC steel sheet. We follow AWS C1.1 for torque testing. The break torque is ≥20 N·m. The failure mode is sheet tearing, not weld spot failure. This means the weld strength is higher than the sheet strength. Our size is M6×25. The head has three or four weld projections. The projection height tolerance is ±0.1 mm. This ensures even contact with the welding electrode. Thread precision is 6g. The length is 25 mm. It works for 1.0 to 3.0 mm thick metal sheets. Our material is carbon steel SWRCH35K or SWCH18A. The carbon content is 0.15 to 0.25%. This gives good weld conductivity and fusion strength. Surface finish is zinc plating. The zinc layer is 5-8 μm thick. This gives basic rust protection. It also does not create too much smoke during welding.

 

 

Why Our Factory and Welding Process Support You

Our factory is in Shanghai Jiading. We have 2300 square meters and 20 workers. We started in 2006. That is 20 years now. We use a mid-frequency inverter DC welder. The welding time is only 0.1 to 0.3 seconds. This works for high speed lines at 30-60 parts per minute. It fits 0.8 mm to 3.0 mm low carbon steel, zinc coated steel, and stainless steel. Stainless steel needs different weld settings. With a molybdenum alloy electrode, we keep stable weld quality after 5000 welds. Mass production takes 2-3 weeks for standard parts. Custom products take 4 weeks. Repeat orders are even faster.

The entire product line is fully customizable.

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