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Back to Technical Information
TAP AND DRILL
SIZE CHART
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THREAD
SIZE
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DRILL
DIAMETER
Coarse Thread
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TAP DRILL
SIZE
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1-64
|
.0595
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No. 53
|
|
2-56
|
.0700
|
No. 50
|
|
3-48
|
.0785
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No. 47
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4-40
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.0890
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No. 43
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5-40
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.1015
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No. 38
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6-32
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.1065
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No. 36
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|
8-32
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.1360
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No. 29
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10-24
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.1495
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No. 25
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12-24
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.1770
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No. 16
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1/4-20
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.2010
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No. 7
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5/16-18
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.2570
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'F'
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3/8-16
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.3125
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5/16
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7/16-14
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.3680
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'U'
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1/2-13
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.4219
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27/64
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9/16-12
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.4844
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31/64
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5/8-11
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.5312
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17/32
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3/4-10
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.6562
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21/32
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7/8-9
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.7656
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49/64
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1"-8
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.8750
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7/8
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Fine Thread
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|
0-80
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.0469
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3/64
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1-72
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.0595
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No. 53
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2-64
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.0700
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No. 50
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3-56
|
.0820
|
No. 45
|
|
4-48
|
.0935
|
No. 42
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|
5-44
|
.1040
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No. 37
|
|
6-40
|
.1130
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No. 33
|
|
8-36
|
.1360
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No. 29
|
|
10-32
|
.1590
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No. 21
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|
12-28
|
.1820
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No. 14
|
|
1/4-28
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.2130
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No. 3
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5/16-24
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.2720
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'I'
|
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3/8-24
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.3320
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'Q'
|
|
7/16-20
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.3906
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25/64
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1/2-20
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.4531
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29/64
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9/16-18
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.5156
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33/64
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5/8-18
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.5781
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37/64
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3/4-16
|
.6875
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11/16
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7/8-14
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.8125
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13/16
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1"-14
|
.9375
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59/64
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© 2006, Creative Assembly Systems, Inc. | An FDMC Company
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