[TowerTalk] pipe tap drill size

[Dan Zimmerman N3OX]

On Thu, Mar 11, 2010 at 2:05 PM, r miles <greenacres113 at charter.net> wrote:

> 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


Jim's got it, but for future reference:

http://en.wikipedia.org/wiki/Drill_and_tap_size_chart

<http://en.wikipedia.org/wiki/Drill_and_tap_size_chart>