L lerner Member Messages 12 May 3, 2010 #1 Hi i need to tap a 3" npsf thread and i am not sure what the hole size should be can you halp me please ?
Hi i need to tap a 3" npsf thread and i am not sure what the hole size should be can you halp me please ?
rtbcomp Moderator Messages 18,574 Location Sheffield UK May 3, 2010 #2 Does this help http://www.engineeringtoolbox.com/npt-national-pipe-taper-threads-d_750.html