Sep 7, 2005 #1 cougfan Aerospace Oct 14, 2004 31 What does the "GH" designate when picking taps (GH3,..,GH7. I know that GH7 cuts a bigger thread than GH3, but I am curious about what GH stands for.
What does the "GH" designate when picking taps (GH3,..,GH7. I know that GH7 cuts a bigger thread than GH3, but I am curious about what GH stands for.
Sep 7, 2005 #2 Eltron Mechanical Mar 3, 2005 2,459 "G” designates Ground Thread. “H” means that pitch diameter is on the high side of basic. These two letters are followed by a numeral showing the tolerance of pitch diameter oversize. Hope that helps. Upvote 0 Downvote
"G” designates Ground Thread. “H” means that pitch diameter is on the high side of basic. These two letters are followed by a numeral showing the tolerance of pitch diameter oversize. Hope that helps.
Sep 7, 2005 #3 Kenneth Aerospace Jun 12, 2001 334 Eltron is correct. Here's what the numbers mean: http://www.newmantools.com/taps/taptech.htm#gh Upvote 0 Downvote
