I don't have a chart, but it takes a #7 drill bit.
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of r miles
Sent: Thursday, March 11, 2010 1:06 PM
To: antennas; towertalk
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
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
__________ Information from ESET NOD32 Antivirus, version of virus signature
database 4936 (20100311) __________
The message was checked by ESET NOD32 Antivirus.
http://www.eset.com
__________ Information from ESET NOD32 Antivirus, version of virus signature
database 4936 (20100311) __________
The message was checked by ESET NOD32 Antivirus.
http://www.eset.com
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|