Overall Thread Shank Size of Length of
length length dia. square square

L ℓ Ds K ℓk


(for blind hole)
Spiral Fluted Taps Spiral Fluted Taps Spiral Pointed Taps
NPT
Hand Taps for American Taper Pipe Threads
Specification


(for through hole)
E
Oxide
NPT 3/4 ~
Recommended Tapping Speed depending on Materials


(for through hole)
Medium carbon steels

5
For icon explanation, refer to P.50


Hand Taps
TYPE:1 TYPE:2


Carbide Taps
Cemented
Segment:1G


Roll Taps
L ℓ Projection Ds K ℓk No. of
Size Class Code Chamfer Type
(inch) (inch) (inch) (inch) (inch) (inch) flutes
For American Pipe Threads
Y83100
NPT 1/16-27 ANSI G 3P 2.125 0.687 0.312 0.312 0.234 0.375 4 1
Y83100BR


Simple Inspection Tools Pipe Taps
Y83101
0.437 0.328 1
Y83101BR
NPT 1/8-27 ANSI G 3P 2.125 0.75 0.312 0.375 4
Y83102
0.312 0.234 2
Y83102BR
Y83103
NPT 1/4-18 ANSI G 3P 2.437 1.062 0.459 0.562 0.421 0.437 4 1
Y83103BR
Y83104
NPT 3/8-18 ANSI G 3P 2.562 1.062 0.454 0.7 0.531 0.5 4 1
Y83104BR
Y83105
NPT 1/2-14 Thread Mills
ANSI G 3P 3.125 1.375 0.579 0.687 0.515 0.625 4 2
Y83105BR
Y83106
NPT 3/4-14 ANSI G 3P 3.25 1.375 0.565 0.906 0.679 0.687 4 2
Y83106BR
Y83107
Dies

NPT 1-11.5 ANSI G 3P 3.75 1.75 0.678 1.125 0.843 0.812 5 2
Y83107BR
Y83108
NPT 1 1/4-11.5 ANSI G 3P 4 1.75 0.686 1.312 0.984 0.937 5 2
Y83108BR
Y83109
NPT 1 1/2-11.5 ANSI G 3P 4.25 1.75 0.699 1.5 1.125 1 6 2
Center Drills


Y83109BR
Y83110
NPT 2-11.5 ANSI G 3P 4.5 1.75 0.667 1.875 1.406 1.125 6 2
Y83110BR
Centering Tools


ANSI
Pipe-4
305