If you have a metal lathe just looking for some work, why not make your own lock nuts? That’s what [my mechanics insight] did ...

They make great theft deterrents, until you realize you've misplaced your key. Here's how to solve the problem of locking lug ...

There are many sizes and varieties of nuts; each with a particular fastening purpose. Some nuts can be applied without tools, and others may have special designs to prevent the nut from loosening.