This screw can be used on steel-built structures, such as scaffoldings, staircases, fences, and iron frames. The customized drill tail can be adjusted according to the purpose of use; it can drill through an iron plate up to 12.5mm thick. The weatherproof grade of the surface coating can also be adjusted in accordance to the conditions of the areas.
Key Features:
* Our self-made heading die provides a precise head angle that perfectly fits the socket.
* The drill tail can be well positioned on the steel plate when tapping and is not easy to slip