Where did this come from? It isn't a common bolt size.
Toolbox -- 1 inch - 12 tpi
Feb 08, 2005
8 Replies
Of course it is!
It's American National Fine Thread.
Muggs
Is "Fine" another word for posh thread? :-)
Only if you use them in a suit.
Muggs
You are right. Looks like the little quick reference card isn't matching up with MH.
Muggs,
Did some more looking. It turns out this is an odd situation. Machinery's Handbook say 12tpi is the standard fine thread as does SW, but in bolt catalogs only 14tpi is available for 1 inch bolts.
Interesting. Even my old Starrett decimal equivalents and tap drill chart shows only 1-8 and 1-12. Looking at tool catalogs they have 1-8,
1-12 and 1-14 taps stocked. HHMMMMMMMMM!Dave H
P. wrote:
For example:
A typical vendor catalog only stocks 1-14 for fine threads.
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1-12 bolts generally aren't on the radar.
SW got me a solution. It is posted on the forum under Toolbox.
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