I made a nail header out of a RR spring clip, a slot punch from a S7 pharmaceutical pin punch and a square punch from a car spring. All to make one wonky nail. (Ran out of time)
the RR clip is some tough stuff and made the S7 pin seem easy to forge. I did not heat treat the slot punch but it worked perfectly to punch the handle end with no deformation at all and a lot of heats to get through the clip. I drilled the nail hole before punching square. Still need to put some files to it as the nail got a little stuck but not bad