Drill and tap size chart

Drill and tap size chart

Below is a comprehensive drill and tap size chart for all drills, imperial and metric, and taps up to 36.5 mm.

Contents

Chart

Diameter Diameter Fractional Drill wire
 gauge[1][2]
Tap size[3][4][5] Clearance Clearance Theoretical percentage of thread[6][7] Outer Diameter
[mm (4 d.p.)] [in (5 d.p.)] [in] [close fit][8] [free fit][9] [%]
0.0483 0.00190 107
0.0500 0.00197
0.0584 0.00230 106
0.0686 0.00270 105
0.0787 0.00310 104
0.0889 0.00350 103
0.0991 0.00390 102
0.1000 0.00394
0.1092 0.00430 101
0.1194 0.00470 100
0.1295 0.00510 99
0.1397 0.00550 98
0.1499 0.00590 97
0.1600 0.00630 96
0.1702 0.00670 95
0.1803 0.00710 94
0.1905 0.00750 93
0.2007 0.00790 92
0.2000 0.00787
0.2108 0.00830 91
0.2210 0.00870 90
0.2311 0.00910 89
0.2413 0.00950 88
0.2500 0.00984
0.2540 0.01000 87
0.2667 0.01050 86
0.2794 0.01100 85
0.2921 0.01150 84
0.3000 0.01181
0.3048 0.01200 83
0.3175 0.01250 82
0.3302 0.01300 81
0.3429 0.01350 80
0.3500 0.01378
0.3680 0.01449 79
0.3969 0.01563 1/64 #0000-160 0.02400" 0.021 in
0.4000 0.01575
0.4064 0.01600 78
0.4200 0.01654
0.4400 0.01732
0.4500 0.01772
0.4572 0.01800 77
0.4600 0.01811
0.4800 0.01890
0.5000 0.01969
0.5080 0.02000 76
0.5334 0.02100 75
0.5500 0.02165
0.5715 0.02250 74
0.6000 0.02362
0.6096 0.02400 73
0.6350 0.02500 72
0.6500 0.02559
0.6604 0.02600 71 #000-120 0.03700"
0.7000 0.02756
0.7112 0.02800 70
0.7417 0.02920 69
0.7500 0.02953
0.7874 0.03100 68
0.7938 0.03125 1/32
0.8000 0.03150
0.8128 0.03200 67
0.8382 0.03300 66
0.8500 0.03346
0.8890 0.03500 65 #00-90 0.05200"
0.9000 0.03543
0.9144 0.03600 64
0.9398 0.03700 63
0.9500 0.03740
0.9652 0.03800 62
0.9906 0.03900 61
1.0000 0.03937
1.0160 0.04000 60
1.0414 0.04100 59
1.0500 0.04134
1.0668 0.04200 58
1.0922 0.04300 57
1.1000 0.04331
1.1500 0.04528
1.1811 0.04650 56
1.1906 0.04688 3/64 #0-80 0.06350" 0.07000"
1.2000 0.04724
1.2500 0.04921
1.3000 0.05118
1.3208 0.05200 55
1.3500 0.05315
1.3970 0.05500 54
1.4000 0.05512
1.4500 0.05709
1.5000 0.05906
1.5113 0.05950 53 #1-64, #1-72 0.07600" 0.08100"
1.5500 0.06102
1.5875 0.06250 1/16
1.6000 0.06299 M2x0.4 0.08661"
1.6129 0.06350 52
1.6500 0.06496
1.7000 0.06693
1.7018 0.06700 51 #2-56 0.08900" 0.09600"
1.7500 0.06890 M2.2x0.45
1.7780 0.07000 50 #2-56, #2-64 0.08900" 0.09600"
1.8000 0.07087
1.8500 0.07283
1.8542 0.07300 49
1.9000 0.07480
1.9304 0.07600 48
1.9500 0.07677
1.9600 0.07717 #3-48 0.10400" 0.11000" 81
1.9700 0.07756 #3-48 0.10400" 0.11000" 79
1.9844 0.07813 5/64 #3-48 0.10400" 0.11000" 78
1.9939 0.07850 47 #3-48 0.10400" 0.11000" 76
2.0000 0.07874 #3-48 0.10400" 0.11000" 75
2.0100 0.07913 #3-48 0.10400" 0.11000" 74
2.0200 0.07953 #3-48 0.10400" 0.11000" 72
2.0300 0.07992 #3-48 0.10400" 0.11000" 71
2.0400 0.08031 #3-48
#3-56
0.10400" 0.11000" 69
81
2.0500 0.08071 #3-48
#3-56
M2.5x0.45
0.10400"
 
0.11000"
 
68
79
 
2.0574 0.08100 46 #3-48
#3-56
0.10400" 0.11000" 66
77
2.0700 0.08150 #3-48
#3-56
0.10400" 0.11000" 65
75
2.0828 0.08200 45 #3-48
#3-56
0.10400" 0.11000" 66
74
2.0900 0.08228 #3-48
#3-56
0.10400" 0.11000" 62
72
2.1000 0.08268 #3-48
#3-56
0.10400" 0.11000" 60
70
2.1100 0.08307 #3-48
#3-56
0.10400" 0.11000" 59
69
2.1200 0.08346 #3-56 0.10400" 0.11000" 67
2.1300 0.08386 #3-56 0.10400" 0.11000" 65
2.1400 0.08425 #3-56 0.10400" 0.11000" 63
2.1500 0.08465 #3-56 0.10400" 0.11000" 62
2.1600 0.08504 #3-56 0.10400" 0.11000" 60
2.1700 0.08543 #3-56 0.10400" 0.11000" 59
2.1844 0.08600 44 #4-36 0.11600" 0.12850" 81
2.1900 0.08622 #4-40 0.11600" 0.12850" 81
2.2000 0.08661 #4-40 0.11600" 0.12850" 78
2.2100 0.08701 #4-40 0.11600" 0.12850" 77
2.2200 0.08740 #4-40 0.11600" 0.12850" 76
2.2300 0.08780 #4-40 0.11600" 0.12850" 75
2.2400 0.08819 #4-40 0.11600" 0.12850" 73
2.2500 0.08858 #4-40 0.11600" 0.12850" 72
2.2600 0.08898 #4-40 0.11600" 0.12850" 71
2.2606 0.08900 43 #4-40 0.11600" 0.12850" 71
2.2700 0.08937 #4-40 0.11600" 0.12850" 70
2.2800 0.08976 #4-40 0.11600" 0.12850" 68
2.2900 0.09016 #4-40
#4-48
0.11600" 0.12850" 67
81
2.3000 0.09055 #4-40
#4-48
0.11600" 0.12850" 66
79
2.3100 0.09094 #4-40
#4-48
0.11600" 0.12850" 65
78
2.3200 0.09134 #4-40
#4-48
0.11600" 0.12850" 64
76
2.3300 0.09 #4-40
#4-48
0.11600" 0.12850" 63
75
2.3400 0.09213 #4-40
#4-48
0.11600" 0.12850" 61
74
2.3500 0.09252 #4-40
#4-48
0.11600" 0.12850" 60
72
2.3749 0.09350 42 #4-48 0.11600" 0.12850" 69
2.3813 0.09375 3/32
2.4000 0.09449
2.4384 0.09600 41
2.4500 0.09646
2.4892 0.09800 40
2.5000 0.09843 M3x0.5 75
2.5273 0.09950 39 #5-40 0.12850" 0.13600" 78
2.5781 0.10150 38 #5-40 0.12850" 0.13600" 72
2.6000 0.10236
2.6416 0.10400 37 #5-44 0.12850" 0.13600" 71
2.7000 0.10630
2.7051 0.10650 36 #6-32 0.14400" 0.14950" 77 .14
2.7500 0.10827
2.7781 0.10938 7/64
2.7940 0.11000 35
2.8000 0.11024
2.8194 0.11100 34
2.8702 0.11300 33 #6-40 .1563 .14
2.9000 0.11417 M3.5x0.6
2.9464 0.11600 32
3.0000 0.11811
3.0480 0.12000 31
3.1000 0.12205
3.1750 0.12500 1/8
3.2000 0.12598
3.2500 0.12795
3.2639 0.12850 30
3.3000 0.12992
3.4000 0.13386
3.4544 0.13600 29 #8-32 0.16950" 0.17700" 69
3.5000 0.13780 M4x0.7 75
3.5687 0.14050 28
3.5719 0.14063 9/64
3.6000 0.14173
3.6576 0.14400 27
3.7000 0.14567
3.7338 0.14700 26
3.7500 0.14764
3.7973 0.14950 25 #10-24 0.19600" 0.20100" 75
3.8000 0.14961
3.8608 0.15200 24
3.9000 0.15354
3.9116 0.15400 23
3.9688 0.15625 5/32
3.9878 0.15700 22
4.0000 0.15748
4.0386 0.15900 21 #10-32 0.1960" 0.2010"
4.0894 0.16100 20
4.1000 0.16142
4.2000 0.16535 M5x0.8 75
4.2164 0.16600 19
4.2500 0.16732
4.3053 0.16950 18
4.3656 0.17188 11/64
4.3942 0.17300 17
4.4000 0.17323
4.4958 0.17700 16 #12-24 0.22100" 0.22800" 72
4.5000 0.17717
4.5720 0.18000 15
4.6000 0.18110
4.6228 0.18200 14
4.6990 0.18500 13
4.7000 0.18504
4.7500 0.18701
4.7625 0.18750 3/16
4.8000 0.18898
4.8006 0.18900 12
4.8514 0.19100 11
4.9000 0.19291
4.9149 0.19350 10
4.9784 0.19600 9
5.0000 0.19685
5.0546 0.19900 8
5.1000 0.20079
5.1054 0.20100 7 1/4-20 0.25700" 0.26600" 72
5.1594 0.20313 13/64
5.1816 0.20400 6
5.2000 0.20472 M6x1.0 75
5.2197 0.20550 5
5.2500 0.20669
5.3000 0.20866
5.3086 0.20900 4
5.4000 0.21260
5.4102 0.21300 3 1/4-28 0.25700" 0.26600" 80
5.5000 0.21654
5.5563 0.21875 7/32
5.6000 0.22047
5.6134 0.22100 2
5.7000 0.22441
5.7500 0.22638
5.7912 0.22800 1
5.8000 0.22835
5.9000 0.23228
5.9436 0.23400 A
5.9531 0.23438 15/64
6.0000 0.23622
6.0452 0.23800 B
6.1000 0.24016 M7x1.0 75
6.1468 0.24200 C
6.2000 0.24409
6.2484 0.24600 D
6.2500 0.24606
6.3000 0.24803
6.3500 0.25000 1/4
E
6.4000 0.25197
6.5000 0.25591 M7X0.5
6.5278 0.25700 F 5/16-18 0.32300" 0.33200" 77
6.6000 0.25984
6.6294 0.26100 G
6.7000 0.26378
6.7469 0.26563 17/64
6.7500 0.26575
6.7564 0.26600 H
6.8000 0.26772
6.9000 0.27165 M8x1.25 75
6.9088 0.27200 I 5/16-24 0.32300" 0.33200" 75
7.0000 0.27559
7.0358 0.27700 J
7.1000 0.27953 M8x1.0 75
7.1374 0.28100 K
7.1438 0.28125 9/32 5/16-32
7.2000 0.28346
7.2500 0.28543
7.3000 0.28740
7.3660 0.29000 L
7.4000 0.29134
7.4930 0.29500 M
7.5000 0.29528
7.5406 0.29688 19/64
7.6000 0.29921
7.6708 0.30200 N
7.7000 0.30315
7.7500 0.30512
7.8000 0.30709
7.9000 0.31102
7.9375 0.31250 5/16 3/8-16 0.38600" 0.39700" 77
8.0000 0.31496
8.0264 0.31600 O
8.1000 0.31890
8.2000 0.32283
8.2042 0.32300 P
8.2500 0.32480
8.3000 0.32677
8.3344 0.32813 21/64
8.4000 0.33071
8.4328 0.33200 Q 3/8-24 0.38600" 0.39700" 79
8.5000 0.33465
8.6000 0.33858
8.6106 0.33900 R
8.7000 0.34252 M10x1.5 75
8.7313 0.34375 11/32
8.7500 0.34449
8.8000 0.34646
8.8392 0.34800 S
8.9000 0.35039 M10x1.25 75
9.0000 0.35433
9.0932 0.35800 T
9.1000 0.35827 M10x1.0
(spark plug)
75
9.1281 0.35938 23/64
9.2000 0.36220
9.2500 0.36417
9.3000 0.36614
9.3472 0.36800 U 7/16-14 0.45310" 0.46870" 75
9.4000 0.37008
9.5000 0.37402
9.5250 0.37500 3/8
9.5758 0.37700 V
9.6000 0.37795
9.7000 0.38189
9.7500 0.38386
9.8000 0.38583
9.8044 0.38600 W
9.9000 0.38976
9.9219 0.39063 25/64 7/16-20 0.45313" 0.46785" 72
10.0000 0.39370
10.0838 0.39700 X
10.2616 0.40400 Y
10.3188 0.40625 13/32
10.4902 0.41300 Z
10.5000 0.41339 M12x1.75 75
10.7000 0.42126 M12x1.5 75
10.7156 0.42188 27/64 1/2-13 0.51563" 0.53125" 78
10.900 0.42913 M12X1.25
(spark plug)
11.0000 0.43307
11.1125 0.43750 7/16
11.5000 0.45276
11.5094 0.45313 29/64 1/2-20 0.51563" 0.53125" 72
11.9063 0.46875 15/32 9/16-12 0.56250" 87
12.0000 0.47244
12.2000 0.48031 M14x2 75
12.3031 0.48438 31/64 9/16-12 0.56250" 68
12.5000 0.49213
12.7000 0.50000 1/2 9/16-18 0.56250" 87
M14x1.5 75
12.8000 0.50393 M14x1.25
(spark plug)
13.0000 0.51181
13.0969 0.51563 33/64 9/16-18 0.56250" 65
13.4938 0.53125 17/32 5/8-11 0.62500" 79
13.5000 0.53150
13.8906 0.54688 35/64 5/8-11 0.62500" 66
14.0000 0.55118
14.2000 0.55906 M16x2 75
14.2875 0.56250 9/16 5/8-18 0.62500" 87
14.5000 0.57087
14.6844 0.57813 37/64 5/8-18 0.62500" 65
14.7000 0.57874 M16x1.5 75
15.0000 0.59055
15.0813 0.59375 19/32
15.4781 0.60938 39/64
15.5000 0.61024
15.8750 0.62500 5/8
16.0000 0.62992
16.2719 0.64063 41/64 3/4-10 84
16.5000 0.64961
16.6688 0.65625 21/32 3/4-10 72
16.8000 0.66141 M18x1.5
(spark plug)
17.0000 0.66929
17.0656 0.67188 43/64
17.4625 0.68750 11/16 3/4-16 77
17.5000 0.68898
17.8594 0.70313 45/64
18.0000 0.70866
18.2563 0.71875 23/32
18.5000 0.72835
18.6531 0.73438 47/64
19.0000 0.74803
19.0500 0.75000 3/4
19.4469 0.76563 49/64 7/8-9 76
19.5000 0.76772
19.8438 0.78125 25/32 7/8-9 65
20.0000 0.78740
20.2406 0.79688 51/64 7/8-14 84
20.5000 0.80709
20.6375 0.81250 13/16 7/8-14 67
21.0000 0.82677
21.0344 0.82813 53/64 7/8-18 NS
(spark plug)
21.4313 0.84375 27/32
21.5000 0.84646
21.8281 0.85938 55/64 1-8 87
22.0000 0.86614
22.2250 0.87500 7/8 1-8 77
22.5000 0.88583
22.6219 0.89063 57/64 1-8 67
23.0000 0.90551
23.0188 0.90625 29/32 1-12 87
23.4156 0.92188 59/64 1-12
1-14
72
84
23.5000 0.92520
23.8125 0.93750 15/16 1-14 67
24.0000 0.94488
24.2094 0.95313 61/64
24.5000 0.96457
24.6063 0.96875 31/32 1 1/8-7 84
25.0000 0.98425
25.0031 0.98438 63/64 1 1/8-7 76
25.4000 1.00000 1 1 1/8-7 67
25.5000 1.00394
25.7969 1.01563 1 1/64
26.0000 1.02362
26.1938 1.03125 1 1/32 1 1/8-12 87
26.5000 1.04331
26.5906 1.04688 1 3/64 1 1/8-12 72
26.9875 1.06250 1 1/16
27.0000 1.06299
27.5000 1.08268
28.0000 1.10236
28.1781 1.10938 1 7/64 1 1/4-7 76
28.5000 1.12205
28.5750 1.12500 1 1/8 1 1/4-7 67
29.0000 1.14173
29.3688 1.15625 1 5/32 1 1/4-12 87
29.5000 1.16142
29.7656 1.17188 1 11/64 1 1/4-12 72
30.0000 1.18110
30.1625 1.18750 1 3/16 1 3/8-6 87
30.5000 1.20079
30.5594 1.20313 1 13/64 1 3/8-6 79
30.9563 1.21875 1 7/32 1 3/8-6 72
31.0000 1.22047
31.3531 1.23438 1 15/64 1 3/8-6 65
31.5000 1.24016
32.0000 1.25984
32.5000 1.27953
32.5438 1.28125 1 9/32 1 3/8-12 87
32.9406 1.29688 1 19/64 1 3/8-12 72
33.0000 1.29921
33.3375 1.31250 1 5/16 1 1/2-6 87
33.5000 1.31890
33.7344 1.32813 1 21/64 1 1/2-6 79
34.0000 1.33858
34.1313 1.34375 1 11/32 1 1/2-6 72
34.5000 1.35827
34.5281 1.35938 1 23/64 1 1/2-6 65
35.0000 1.37795
35.5000 1.39764
35.7188 1.40625 1 13/32 1 1/2-12 87
36.0000 1.41732
36.1156 1.42188 1 27/64 1 1/2-12 72
36.5000 1.43701

If theoretical thread percentage not given, assume 75% ± 10%
  Theoretical percentage of thread should not be relied upon for threads of included angles other than 60 degrees.
See http://www.newmantools.com/taps/micro.htm for more information.

See also

References

External links


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