Machinery's Handbook, 31st Edition
990
Taps Table 10. Special Fine Pitch Taps, Short Series ANSI/ASME B94.9-2008 (R2018), Appendix (Taps Dimensions, Ground and Cut Threads)
L
I 4
I
I 2
a
d 1
Taps Dimensions, inches
Nominal Fractional Diameter
Nominal Metric Diameter
Nominal Diameter Range, inch
Overall Length
Thread Length
Square Length
Shank Diameter
Size of Square
inch
mm
Over 1.070 1.073 1.135 1.198 1.260 1.323 1.385 1.448 1.510 1.635 1.760 1.885 2.010 2.135 2.260 2.385 2.510 2.635 2.760 2.885 3.010 3.135 3.260 3.385 3.510 3.635 3.760 3.885
To
L
I
a
I 2
d 1
1.073 1.135 1.198 1.260 1.323 1.385 1.448 1.510 1.635 1.760 1.885 2.010 2.135 2.260 2.385 2.510 2.635 2.760 2.885 3.010 3.135 3.260 3.385 3.510 3.635 3.760 3.885 4.010
M27
4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 5.00 5.00 5.00 5.00 5.25 5.25 5.25 5.25 5.50 5.50 5.50 5.50 5.75 5.75 5.75 5.75 6.00 6.00 6.00 6.00
1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00
0.88 0.88 1.00 1.00 1.00 1.00 1.00 1.00 1.13 1.25 1.25 1.38 1.44 1.44 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.75 1.75 1.75 1.75
0.8960 0.672 0.8960 0.672 1.0210 0.766 1.0210 0.766 1.1080 0.831 1.1080 0.831 1.2330 0.925 1.2330 0.925 1.3050 0.979 1.4300 1.072 1.5190 1.139 1.6440 1.233 1.7690 1.327 1.8940 1.420 2.0190 1.514 2.1000 1.575 2.1000 1.575 2.1000 1.575 2.1000 1.575 2.1000 1.575 2.1000 1.575 2.1000 1.575 2.1000 1.575 2.1000 1.575 2.1000 1.575 2.1000 1.575 2.1000 1.575
1 1 ⁄ 16
…
1 1 ⁄ 8
M30
1 3 ⁄ 16
…
1 1 ⁄ 4
M33
1 5 ⁄ 16
…
1 3 ⁄ 8
M36
1 7 ⁄ 16
…
1 1 ⁄ 2 1 5 ⁄ 8 1 3 ⁄ 4 1 7 ⁄ 8 2 1 ⁄ 8 2 1 ⁄ 4 2 3 ⁄ 8 2 1 ⁄ 2 2 2 5 ⁄ 8 2 3 ⁄ 4 2 7 ⁄ 8 3 1 ⁄ 8 3 1 ⁄ 4 3 3 ⁄ 8 3 1 ⁄ 2 3 3 5 ⁄ 8 3 3 ⁄ 4 3 7 ⁄ 8
M39 M42
…
M48
…
M56
… …
M64
…
M72
… …
M80
… …
M90
… …
4 2.1000 1.575 Unless otherwise specified, special taps 1.010 inches to 1.510 inches in diameter, inclusive, have 14 or more threads per inch or 1.75 mm pitch and finer. Sizes greater than 1.510 inch in diameter with 10 or more threads per inch or 2.5 mm pitch and finer will be made to the general dimensions shown above. For tolerances, see Table 5b. For runout tolerances of tap elements, see Table 14. M100
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