What do you do… ahem, what do I do if it’s Independence Day and my wife’s bike is missing a metric nut? Make a new nut, of course!I made it out of a bolt head. First, I measured the bike’s bolt (where the nut was supposed to go) to see what kind of thread it had. Then I put a different bolt on my lathe and drilled a hole in its head. I step-drilled it, meaning I started with a small hole and gradually used larger drill bits. Next, I cut the head off the bolt, and finally I cut threads in it with a tap.