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Over the years, climate change has made screws more vulnerable to corrosion. One of the options is bi-metal screw. This screw weld SS304 screw body and carbon steel self-drilling point. It is a complex process that is very costly.
We think differently. SEC use SS304 to form a cap and capped on the screws head. This screw combines the anti-corrosion ability of SS 304 and the drilling capability of the carbon steel. Moreover, the cost is more compatible than bi-metal screw.