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

[Don Robert House]

To: WA5CAB at cs.com
Subject: Re: [GreenKeys] Model 28 Leveler Bolt is 1/2-13 x 1 1/2

Grainger Industrial Supply has many of these taps and dies.  Some are  
nice and long for hard to get at jobs.
(Like tapping the body of my Packard's Cormorant hood ornament)  http://grainger.com/

BoltDepot.com carries 5-40 and 12-24 in several styles... also #2  
machine screws... man are they tiny..!

Don


On 17 Mar 2010, at 12:30 AM, WA5CAB at cs.com wrote:

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
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