[GreenKeys] Model 28 Leveler Bolt is 1/2-13 x 1 1/2

[WA5CAB at cs.com]

FWIW, although screws, nuts and bolts in odd or what seem odd today thread 
pitches are hard to come by, taps and dies generally are not.  Several times 
working on military sets I've had to visit a local full-line machine shop 
supply place.  BC-611's use #5-40 and #12-24 threads.  No longer common.  The 
threads on all of the cable glands in Korean War vintage vehicular radio 
mounts are another odd one, something like 3/4-20, and I found taps and dies 
for that as well, with no problem other than a short drive.

In a message dated 3/16/2010 10:39:01 PM Central Standard Time, 
nagle at animats.com writes: 
> >Date: Tue, 16 Mar 2010 23:22:41 -0500
> >From: Don Robert House <k9tty at dls.net>
> >Subject: [GreenKeys] Model 28 Leveler Bolt is 1/2-13 x 1 1/2 !!!
> >To: Larry Tighe <larryradio at att.net>
> >Cc: greenkeys at mailman.qth.net
> >Message-ID: <32B9A2C3-CA8D-40AE-ADC0-341DC5C1D6D6 at dls.net>
> >Content-Type: text/plain; charset="us-ascii"
> >
> >Here is one of the leveler bolts.
> >
> >I double checked the size with my thread gauge and micrometer...
> >
> >As Randy wrote the size is 1/2-13.  I must have misread the label at  
> >Home Depot.
> >
> >I guess my eyes are going bad I will go see the eye doctor...
> >
> >Don
> 
>      1/2" x 13 TPI is a standard ANSI thread, class 2A.
> 
>      Almost anything post-1949 will be either standard ANSI or standard 
> metric.
> Unlike my problems with the Model 15, which takes a non-standard mounting 
> bolt
> (3/8" x 28 TPI) which I had to make, the later stuff is standard.
> 
>      The NYC Resistors made a knob for a Model 15 using a 
> stereolithography
> machine.  Useful if you have a Model 15 with no crank.  See 
> "http://www.thingiverse.com/thing:1827"
> 

Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480