right, 3/16 ths - 47 or 48 . where in the heck do you find that, let alone right and left ? I do a lot of caliber swaps and have run into some tight, and or damaged leads. Hate to throw any thing out. guess I will have to buy a bunch more. I could probably make them on the lathe, but they are so dang small !!!! thanks for all the replies. Anybody knows of a source of tap or die, I would be thankful.