The next time you can't find a nut to fit a special bolt, try making your own by filling an oversized nut with epoxy cement and molding the threads. Seat the nut in modeling clay before pouring in the epoxy. Grease the bolt, then screw it down through the epoxy into the clay. Wait a day, unscrew the bolt from the hardened epoxy, and you will have a perfect fitting nut for moderate duty.