Scrap Nut

Many stock bolts are designed to self-thread into unthreaded blocks of steel, which are cheaper for the factory to produce & install for optional equipment than threaded nuts would be. So for body modifications, it's convenient to weld on a scrap of steel that's simply drilled the correct size, and run an original bolt through.

For chairs, consider the long-term effects of a 200-lb human rocking around in the 40-lb chair on this ~20-ga sheet metal.

Owner caption July 2012 · Photo 4559 of 5000