Ark Posted September 7, 2007 Share Posted September 7, 2007 Chaps, I need to get a drill and tap in order to fit my Defi EGT probe. I know it's a 1/8 NPT thread, but I need to know the size and thread pitch this equates to... Thanks Link to comment Share on other sites More sharing options...
steb9780 Posted September 7, 2007 Share Posted September 7, 2007 Does this help http://www.engineeringtoolbox.com/npt-national-pipe-taper-threads-d_750.html Link to comment Share on other sites More sharing options...
steb9780 Posted September 7, 2007 Share Posted September 7, 2007 I think this is the drilling size http://icrank.com/cgi-bin/pageman/pageout.cgi?path=/chart_npt.htm&t=2 Link to comment Share on other sites More sharing options...
steb9780 Posted September 7, 2007 Share Posted September 7, 2007 Also found this which looks very handy as long as it's accurate. http://bobmay.astronomy.net/misc/drillchart.htm Link to comment Share on other sites More sharing options...
Ark Posted September 7, 2007 Author Share Posted September 7, 2007 Thanks, yes that is helpful. Link to comment Share on other sites More sharing options...
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