Spiral Pointed Tap Overall Thread Thread+Neck Shank Size of Length of length length length dia. square square L ℓ ℓn Ds K ℓk ZELX SS PO Spiral Pointed Taps for Stainless Steels Spiral Fluted Taps (for blind hole) Size Class Code Chamfer L ℓ ℓn Ds K ℓk No. of Type (inch) (inch) (inch) (inch) (inch) (inch) flutes For Unified Threads No.2-56UNC GH2 Y82623 4.5P 1.75 0.256 0.437 0.141 0.11 0.187 2 1 No.3-48UNC GH2 Y82600 4.5P 1.812 0.295 0.5 0.141 0.11 0.187 2 1 Spiral Fluted Taps (for through hole) GH2 Y82601 GH3 Y82602 No.4-40UNC 4.5P 1.875 0.335 0.562 0.141 0.11 0.187 2 1 GH4 Y82612 GH5 Y82634 Spiral Pointed Taps (for through hole) No.4-48UNF GH2 Y82683 4.5P 1.875 0.335 0.562 0.141 0.11 0.187 2 1 No.5-40UNC GH2 Y82603 4.5P 1.937 0.374 0.625 0.141 0.11 0.187 3 1 GH2 Y82604 GH3 Y82605 GH4 Y82608 Hand Taps No.6-32UNC 4.5P 2 0.413 0.687 0.141 0.11 0.187 3 1 GH5 Y82635 GH6 Y82659 GH7 Y82665 GH2 Y82684 Cemented Carbide Taps No.6-40UNF 4.5P 2 0.413 0.687 0.141 0.11 0.187 3 1 GH3 Y82642 GH2 Y82606 GH3 Y82607 GH4 Y82629 No.8-32UNC 4.5P 2.125 0.453 0.75 0.168 0.131 0.25 3 1 Roll Taps GH5 Y82637 GH6 Y82660 GH7 Y82667 No.8-36UNF GH2 Y82686 4.5P 2.125 0.453 0.75 0.168 0.131 0.25 3 1 GH3 Y82609 Pipe Taps Simple Inspection Tools GH5 Y82639 No.10-24UNC 4.5P 2.375 0.531 0.875 0.194 0.152 0.25 3 1 GH6 Y82690 GH7 Y82669 GH2 Y82611 GH3 Y82610 GH4 Y82630 No.10-32UNF 4.5P 2.375 0.531 0.875 0.194 0.152 0.25 3 1 GH5 Y82640 GH6 Y82661 Thread Mills GH7 Y82670 No.12-24UNC GH3 Y82688 4.5P 2.375 0.571 0.937 0.220 0.165 0.281 3 1 No.12-28UNF GH3 Y82689 4.5P 2.375 0.571 0.937 0.220 0.165 0.281 3 1 GH3 Y82613 Dies GH5 Y82643 1/4-20UNC 4.5P 2.5 0.591 1 0.255 0.191 0.312 3 2 GH6 Y82590 GH7 Y82673 GH3 Y82614 GH4 Y82631 Center Drills 1/4-28UNF GH5 Y82644 4.5P 2.5 0.591 1 0.255 0.191 0.312 3 2 GH6 Y82662 GH7 Y82674 GH3 Y82615 Centering Tools 5/16-18UNC GH5 Y82645 4.5P 2.718 0.669 1.125 0.318 0.238 0.375 3 3 GH7 Y82675 GH3 Y82616 5/16-24UNF 4.5P 2.718 0.669 1.125 0.318 0.238 0.375 3 3 GH4 Y82632 ANSI PO-9 236