Spiral Pointed Tap Overall
length
L
Thread
length

Thread+Neck
length
ℓn
Shank
length
ℓs
Shank
dia.
Ds
Size of
square
K
Length of
square
ℓk
ZELX NI PO Spiral Pointed Taps for Nickel Base Alloys
L ℓ ℓn Ds K ℓk No. of
Spiral Pointed Taps Spiral Fluted Taps Spiral Fluted Taps
(for blind hole)


Size Class Code Chamfer Type
(inch) (inch) (inch) (inch) (inch) (inch) flutes
GH3 Y85518
GH4 Y85533
3/8-24UNF GH5 Y85548 4.5P 2.937 0.748 1.25 0.381 0.286 0.437 3 3
(for through hole)


GH6 Y85564
GH7 Y85578
GH3 Y85519
7/16-14UNC 4.5P 3.156 0.866 - 0.323 0.242 0.406 3 4
GH5 Y85549
GH3 Y85520
(for through hole)


7/16-20UNF 4.5P 3.156 0.866 - 0.323 0.242 0.406 3 4
GH5 Y85550
GH3 Y85521
1/2-13UNC 4.5P 3.375 0.984 - 0.367 0.275 0.437 3 4
GH5 Y85551
GH3 Y85522
Hand Taps


GH5 Y85552
1/2-20UNF 4.5P 3.375 0.984 - 0.367 0.275 0.437 3 4
Y85582
GH7
Y85582NI
GH3 Y85525
Cemented
Carbide Taps


5/8-11UNC GH5 Y85555 4.5P 3.812 1.083 - 0.48 0.36 0.562 3 4
GH7 Y85585
GH3 Y85526
5/8-18UNF GH5 Y85556 4.5P 3.812 1.083 - 0.48 0.36 0.562 3 4
GH7 Y85586
Roll Taps


GH3 Y85527
3/4-10UNC 4.5P 4.25 1.201 - 0.59 0.442 0.687 3 4
GH5 Y85557
GH3 Y85528
3/4-16UNF 4.5P 4.25 1.201 - 0.59 0.442 0.687 3 4
GH5 Y85558
Pipe Taps Simple Inspection Tools
Thread Mills
Dies
Center Drills
Centering Tools


ANSI
PO-21
248