Hardware: self-drilling screws
Self-tutoring about fasteners: the tutor mentions self-drilling screws.
The following is according to my understanding.
Lately, disassembling something, I encountered screws that to me were strange. Rather than a point, they have a specific formation below the threads. It’s somewhat like a drill bit.
Well, it turns out these are self-drilling screws, meant for fastening things to metal. I guess one can drill said screws directly into metal without a pilot hole.
The item I found them from was one that had plastic fastened to metal, so this makes sense. One can imagine the time saved using a self-drilling screw as opposed to drilling through, then fastening with a nut and bolt.
Source:
Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.
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