
h stock standard, ) check stock EU, f check stock JP, m stock exhaustion UNC TCTR Ø Hole Ø(tolerance)(mm)(mm)CodeTHCHT(chamfer)LF LT THL LU LS DCON K LK(inch)(inch)(inch)(inch)(inch)(inch)(inch)(inch)NOFTypeStockIntro ANSI GH3 5.1 5.19 Y87613 3P 2.5 - 0.433 1 - 0.26 0.191 0.312 3 002 f 1/4-20UNC GH3 5.1 5.19 Y87628 1.5P 2.5 - 0.433 1 - 0.26 0.191 0.312 3 002 f SP 5/16-18UNC GH3 6.6 6.65 Y87615 3P 2.718 - 0.472 1.125 - 0.32 0.238 0.375 3 002 f ANSI GH3 6.6 6.65 Y87695 1.5P 2.718 - 0.472 1.125 - 0.32 0.238 0.375 3 002 f GH3 8 8.07 Y87617 3P 2.937 - 0.551 1.25 - 0.38 0.286 0.437 3 002 f 3/8-16UNC GH3 8 8.07 Y87611 1.5P 2.937 - 0.551 1.25 - 0.38 0.286 0.437 3 002 f SL GH3 9.4 9.45 Y87619 3P 3.156 - 0.591 - - 0.32 0.242 0.406 3 014 f 7/16-14UNC GH3 9.4 9.45 Y81629 1.5P 3.156 - 0.591 - - 0.32 0.242 0.406 3 014 f GH3 10.9 10.91 Y87621 3P 3.375 - 0.630 - - 0.37 0.275 0.437 3 014 f PO 1/2-13UNC GH3 10.9 10.91 Y87021 1.5P 3.375 - 0.630 - - 0.37 0.275 0.437 3 014 f GH5 10.9 10.91 Y87626 3P 3.375 - 0.630 - - 0.37 0.275 0.437 3 014 f UNF TCTR Ø Hole Ø(tolerance)(mm)(mm)CodeTHCHT(chamfer)LF LT THL LU LS DCON K LK(inch)(inch)(inch)(inch)(inch)(inch)(inch)(inch)NOFTypeStockST ANSI GH3 4.1 4.12 Y87610 3P 2.375 - 0.276 0.875 - 0.19 0.152 0.25 3 002 ) GH3 4.1 4.12 Y87010 1.5P 2.375 - 0.276 0.875 - 0.19 0.152 0.25 3 002 f GH4 4.1 4.12 Y87630 3P 2.375 - 0.276 0.875 - 0.19 0.152 0.25 3 002 f ROLL No.10-32UNF GH5 4.1 4.12 Y87640 3P 2.375 - 0.276 0.875 - 0.19 0.152 0.25 3 002 f GH6 4.1 4.12 Y87661 3P 2.375 - 0.276 0.875 - 0.19 0.152 0.25 3 002 f GH7 4.1 4.12 Y87670 3P 2.375 - 0.276 0.875 - 0.19 0.152 0.25 3 002 f CARBIDE GH3 5.5 5.53 Y87614 3P 2.5 - 0.354 1 - 0.26 0.191 0.312 3 002 ) GH3 5.5 5.53 Y87014 1.5P 2.5 - 0.354 1 - 0.26 0.191 0.312 3 002 f GH4 5.5 5.53 Y87631 3P 2.5 - 0.354 1 - 0.26 0.191 0.312 3 002 f 1/4-28UNF GH5 5.5 5.53 Y87644 3P 2.5 - 0.354 1 - 0.26 0.191 0.312 3 002 f LONG GH6 5.5 5.53 Y87662 3P 2.5 - 0.354 1 - 0.26 0.191 0.312 3 002 f GH7 5.5 5.53 Y87674 3P 2.5 - 0.354 1 - 0.26 0.191 0.312 3 002 f GH3 6.9 6.97 Y87616 3P 2.718 - 0.394 1.125 - 0.32 0.238 0.375 3 002 ) HAND GH3 6.9 6.97 Y87016 1.5P 2.718 - 0.394 1.125 - 0.32 0.238 0.375 3 002 f TAPS GH4 6.9 6.97 Y87632 3P 2.718 - 0.394 1.125 - 0.32 0.238 0.375 3 002 f 5/16-24UNF GH5 6.9 6.97 Y87646 3P 2.718 - 0.394 1.125 - 0.32 0.238 0.375 3 002 f GH6 6.9 6.97 Y87663 3P 2.718 - 0.394 1.125 - 0.32 0.238 0.375 3 002 f EG (STI) GH7 6.9 6.97 Y87676 3P 2.718 - 0.394 1.125 - 0.32 0.238 0.375 3 002 f GH3 8.5 8.57 Y87618 3P 2.937 - 0.394 1.25 - 0.38 0.286 0.437 3 002 ) GH4 8.5 8.57 Y87633 3P 2.937 - 0.394 1.25 - 0.38 0.286 0.437 3 002 f SPECIAL 3/8-24UNF GH5 8.5 8.57 Y87648 3P 2.937 - 0.394 1.25 - 0.38 0.286 0.437 3 002 f THREADS,GAUGES GH6 8.5 8.57 Y87664 3P 2.937 - 0.394 1.25 - 0.38 0.286 0.437 3 002 f GH7 8.5 8.57 Y87678 3P 2.937 - 0.394 1.25 - 0.38 0.286 0.437 3 002 f GH3 8.5 8.57 Y87018 1.5P 2.937 - 0.394 1.25 - 0.38 0.286 0.437 3 002 f THREAD GH3 9.9 9.96 Y87620 3P 3.156 - 0.472 - - 0.32 0.242 0.406 3 014 f MILLS 7/16-20UNF GH3 9.9 9.96 Y87020 1.5P 3.156 - 0.472 - - 0.32 0.242 0.406 3 014 f GH5 9.9 9.96 Y87650 3P 3.156 - 0.472 - - 0.32 0.242 0.406 3 014 f GH3 11.5 11.54 Y87622 3P 3.375 - 0.472 - - 0.37 0.275 0.437 3 014 f DIES 1/2-20UNF GH3 11.5 11.54 Y87023 1.5P 3.375 - 0.472 - - 0.37 0.275 0.437 3 014 f GH5 11.5 11.54 Y87652 3P 3.375 - 0.472 - - 0.37 0.275 0.437 3 014 f CENTER DRILLS Technical info The most suitable GH tap class to cut accurate 2B, 3B (UNJ) and 2B oversized internal threads tolerance, depends on application conditions and work-piece materials. Yamawa GH class system offers a wide range of alternative tap classes allowing each customer to select the most suitable one according to application requirement. 193 Check page 673 of Technical info for full details.