flat 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.

The plating of the self-drilling screw of the cross recessed countersunk head generally refers to the plating of the iron Phillips screw. The stainless steel Phillips screw is rarely plated. The color of the Phillips screw plating is environmentally friendly and non-environmental. The environmental protection plating color has environmental protection white. Zinc, environmentally friendly blue zinc, environmentally friendly color zinc, environmentally friendly black zinc, environmentally friendly white nickel, etc., non-environmental white nickel, white zinc, color zinc, black zinc, black nickel, black, blue zinc.