Nut centering tool for welding

[trevor_60_r]

Centre nut in hole for tackwelding

Hi Toolmaker51,

Thanks for pointing that out. I understand that Flathead/ Countersunk screws are not machined and are forged by machine and the threads are rolled (for want of a better description) so the threads are most likely not to be concentric to the tapers, but they serve as a solution for the most of the fabrication that I do because the piece being attached has plenty of hole clearance. For a more accurate centering device I have screwed a nut on a bolt, set it up in my lathe and machined a 45⁰ angle on the nut but this will still not be as accurate (Tuomas machined copper tool).

Thanks again for your information.
Trevor

[Toolmaker51]

They are rolled, and that is precisely the name of operation, industry-wide.

The bulk of my responses key on the OP, but address all users, that such knowledge is not wholesale. I have a closet instructor inside, a real bugger to contain. Restrain. Detain.
Don't know, but it's one of those. I'm certain.