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I need a nut

I'm no machinist but I have had way better luck using the strings of metric and SAE thread checkers from amazon.
On them you can thread the bolt or nut you're checking on nearly an inch.
 
I'm no machinist but I have had way better luck using the strings of metric and SAE thread checkers from amazon.
On them you can thread the bolt or nut you're checking on nearly an inch.

I bought a set of those from AliExpress. Mine are only good to a depth of about 3/4 inch. I like them too. They are similar to the sizing plates you see at hardware stores. Basically male and female masters of common threads. Here is an amazon link. They cost less on Ali.


For little tiny screws, I like the imperial and metric Screw Chek'r.


While thread identifiers like these are often way more convenient than other approaches, they don't cover the full waterfront. They would not have helped me with the whacky thread on the Z lift of my mill or the custom height adjusters on a few of my BXA tool holders, or or or......

As I mentioned in my very first post on this thread, identifying a thread using any of these methods only works if the manufacturer follows the standards. Old pre-standard stuff and custom stuff could be anything.
 
The imperial/SAE unified national coarse and fine thread standards (Unified National Coarse - UNC and Unified National Fine - UNF) were agreed upon in 1949 by the United States, Great Britain, and Canada. This standardization was intended to ensure interchangeability of fasteners and tools between the three countries.

But that is still no guarantee that they were used on any given application.

The lantern style toolpost and tools certainly predate 1949.
 
Daniel, did you get a chance to try out the Armstrong tool holder with the new nuts? I had never seen one quite like that. It worked pretty slick here.Looked like it has adjustment every 15 degrees or so.
Might not hurt to case harden the nuts with a torch and some oil.
 
Yes Sir, I did play with it a bit, and good idea on the hardening. I will give it a go. Thanks again. I'll think of some excuse to see more of yer shop some time....................Daniel
 
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