Overall Thread Thread+Neck Shank Size of Length of length length length dia. square square L ℓ ℓn Ds K ℓk ZELX NI SP Spiral Fluted Taps for Nickel Base Alloys Size Class Code Chamfer L ℓ ℓn Ds K ℓk No. of Type (for blind hole) Spiral Fluted Taps (inch) (inch) (inch) (inch) (inch) (inch) flutes GH6 Y87563 5/16-24UNF 3P 2.718 0.394 1.125 0.318 0.238 0.375 3 3 GH7 Y87576 Y87517 3P GH3 (for through hole) Spiral Fluted Taps Y87017 1.5P 3/8-16UNC 2.937 0.551 1.25 0.381 0.286 0.437 3 3 Y87547 3P GH5 Y87047 1.5P GH3 Y87518 3P Y87533 (for through hole) Spiral Pointed Taps GH4 Y87033 1.5P 3/8-24UNF 2.937 0.394 1.25 0.381 0.286 0.437 3 3 GH5 Y87548 GH6 Y87564 3P GH7 Y87578 GH3 Y87519 Hand Taps 7/16-14UNC 3P 3.156 0.591 - 0.323 0.242 0.406 3 4 GH5 Y87549 Y87520 3P GH3 Y87573 1.5P 7/16-20UNF 3.156 0.472 - 0.323 0.242 0.406 3 4 Carbide Taps Cemented Y87550 3P GH5 Y87050 1.5P Y87521 3P GH3 Y87500 1.5P 1/2-13UNC Y87551 3P 3.375 0.630 - 0.367 0.275 0.437 3 4 Roll Taps GH5 Y87051 1.5P GH7 Y87581 3P Y87522 3P GH3 Y87022 1.5P 1/2-20UNF 3.375 0.472 - 0.367 0.275 0.437 3 4 Simple Inspection Tools Pipe Taps GH5 Y87552 3P GH7 Y87582 GH3 Y88554 9/16-18UNF 3P 3.593 0.512 - 0.429 0.322 0.5 3 4 GH5 Y88542 GH3 Y87525 5/8-11UNC GH5 Y87555 3P 3.812 0.748 - 0.480 0.36 0.562 4 4 GH7 Y87585 Y87526 3P GH3 Y81508 1.5P Thread Mills 5/8-18UNF 3.812 0.512 - 0.480 0.36 0.562 4 4 GH4 Y87536 3P GH5 Y87556 Y87527 3P GH3 3/4-10UNC Y87027 1.5P 4.25 0.827 - 0.590 0.442 0.687 4 4 Dies GH5 Y87557 3P GH3 Y87528 3/4-16UNF 3P 4.25 0.591 - 0.590 0.442 0.687 4 4 GH5 Y87558 Center Drills Centering Tools ANSI SP-30 217