1"-14 NS Tap

[lptools]

Hello, I have been trying to fill in a large Tap & Die Set.I have been looking for a 1"-12 NF Bolt Tap for a while. But today I looked at the list of contents to the set, and it calls for a 1"-14 NS Bolt Tap. Is that an unusual size? Thanks, Lou

[leg17]

Both sizes have such widespread application that there never has been enough pressure to finally eliminate one.
If you want to be covered, better get them both.

[lptools]

Hello, Thanks for the info. That is what I will do, include both. Thanks again, Lou

[leg17]

Be sure to double check any application.
I have seen expensive mistakes made when 'assuming' which one was correct.
Confirm the bolt or whatever before tapping the hole.
Seriously.

[Spartan-C]

Yeah, 1"-14 UNF has pretty much surpassed 1"-12 NF in recent years.  I know I use 1"-14 UNF on a lot of equipment I design today.