[R-390] Tap size for R-390A Knobs

[Tom Frobase]

Thanks Dave,

There are some 40 TPI taps around for rifle sights I was not sure if it 
36 TPI NF or that one ... 73, Tom, N3LLL


Dave or Debbie Metz wrote:
> Tom,
> I seem to recall it might be a 36 pitch and plenty unusual.   The 
> trouble is, I can't remember why I suspect that. Could be experience 
> or something on the list.  So be careful.
> dave
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> At 11:22 PM 9/1/2007, you wrote:
>> The best I can tell the tap size for the smaller R-390A knobs is an 8 
>> / 40 anyone else have information other than that? ... thanks tom, N3LLL
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