h stock standard, ) check stock EU, f check stock JP, m stock exhaustion 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)NOFTypeStockIntro ANSI GH3 9.9 9.96 Y87520 3P 3.156 - 0.472 - - 0.32 0.242 0.406 3 014 f 7/16-20UNF GH3 9.9 9.96 Y87573 1.5P 3.156 - 0.472 - - 0.32 0.242 0.406 3 014 f SP GH5 9.9 9.96 Y87550 3P 3.156 - 0.472 - - 0.32 0.242 0.406 3 014 f ANSI GH5 9.9 9.96 Y87050 1.5P 3.156 - 0.472 - - 0.32 0.242 0.406 3 014 f GH3 11.5 11.54 Y87522 3P 3.375 - 0.472 - - 0.37 0.275 0.437 3 014 f GH3 11.5 11.54 Y87022 1.5P 3.375 - 0.472 - - 0.37 0.275 0.437 3 014 f SL 1/2-20UNF GH5 11.5 11.54 Y87552 3P 3.375 - 0.472 - - 0.37 0.275 0.437 3 014 f GH7 11.5 11.54 Y87582 3P 3.375 - 0.472 - - 0.37 0.275 0.437 3 014 f 9/16-18UNF GH3 12.9 13 Y88554 3P 3.593 - 0.512 - - 0.43 0.322 0.5 3 014 f PO GH5 12.9 13 Y88542 3P 3.593 - 0.512 - - 0.43 0.322 0.5 3 014 f GH3 14.5 14.6 Y87526 3P 3.812 - 0.512 - - 0.48 0.36 0.562 4 014 f GH3 14.5 14.6 Y81508 1.5P 3.812 - 0.512 - - 0.48 0.36 0.562 4 014 f 5/8-18UNF GH4 14.5 14.6 Y87536 3P 3.812 - 0.512 - - 0.48 0.36 0.562 4 014 f ST GH5 14.5 14.6 Y87556 3P 3.812 - 0.512 - - 0.48 0.36 0.562 4 014 f GH7 14.5 14.6 Y87586 3P 3.812 - 0.512 - - 0.48 0.36 0.562 4 014 f GH3 17.5 17.59 Y87528 3P 4.25 - 0.591 - - 0.59 0.442 0.687 4 014 f 3/4-16UNF GH5 17.5 17.59 Y87558 3P 4.25 - 0.591 - - 0.59 0.442 0.687 4 014 f ROLL CARBIDE LONG HAND TAPS EG (STI) SPECIAL THREADS, GAUGES THREAD MILLS DIES 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. 191 Check page 673 of Technical info for full details.