Flow Drilling - Friction Drilling - Form Drilling. Basically, you create your own inserts.

Basically, you create your own inserts.Drilling Holes in many materials using a Formdrill tool is a productive process to create strong threaded connections. By forming with friction enery, a hole is created and the wall thickness is increased. By tooling option, the top rim can be cut off in the same operation. The increased material thickness provides additional strenght and mostly eliminated the need for inserted bushings.or welded nuts

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