galvanized self drilling screws
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Countersunk Head Self Drilling Screws
When using countersunk head self drilling screws, there is no need for auxiliary machining on the surface and inside of the connected parts. The countersunk head self drilling screws can be drilled directly on the setting materials and foundation materials, tapping and locking, and can be quickly completed. It can be quickly and automatically drilled and directly rotated. Tightly fixed; the construction efficiency of self-drilling screws is extremely high; the construction time is saved to the utmost extent, the engineering construction efficiency is improved, and the economic benefit of the boss is improved.
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