wrote in message
...

On Oct 16, 10:12 pm, "Ed Huntress" wrote:

I checked mine with a loupe; it's definitely 18 tpi.

--
Ed Huntress


Yours may be 18 tpi, but the standard is 20 tpi.

http://houseofantiquehardware.com/s.nl/it.A/id.3517/.f

Dan

Why did you clip out the reference to 3/8 x 18s, Dan?

Besides the Lockwoods, here are some other manufacturers who used 18 tpi
threads:

http://www.robertbrooke.com/door/loc...n_russwin.html

http://www.robertbrooke.com/door/locksets_marks.html

If you look around, you'll see that there appear to have been three
standards for 3/8" threaded door knob spindles: 16 tpi, 18 tpi, and 20 tpi.

--
Ed Huntress