[TowerTalk] pipe tap drill size

[RICHARD SOLOMON]

I have had a few boxes of drills over the years (#1 through #~75). Each one 
has a chart for tap and clear drill sizes for screw sizes #2-56 through 1/4-20. 
It's stamped into the front so you can't lose it.

73, Dick, W1KSZ

> Date: Thu, 11 Mar 2010 14:05:45 -0500
> From: greenacres113 at charter.net
> To: antennas at mailman.qth.net; towertalk at contesting.com
> Subject: [TowerTalk] pipe tap drill size
> 
> I am putting two gusset plates to hold truss supports on my homebrew 30m Moxon. I'm using 1/4'' X 20 bolts. It's  been 40 yr.s since I worked in a machine shop. Don't have the proper hole size chart  for taps anymore.  I assume the hole size to be threaded 1/4 x 20 is less than 3/16''. Anyone have a chart showing the proper size.TNX
> K9IL
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