The process of cutting threads in the wall of a hole is known as tapping. Sheet metal screws are known as self-tapping fasteners because they cut their own threads into the material (aluminum or p ...

Drill a 3/16-in. hole in the center of the rear support pipe, then screw a 2-in. #8 sheet metal screw (use a 1/8-in. pilot ...

[bitluni] took matters into his own hands and built this nifty DIY hole punch for light-gauge sheet metal. A little backstory will probably help understand why [bitluni] needs so many holes.