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The Web's best Machine Design Guide for Mechanical Engineers and Designers
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| Reference data you can use, a standard drill size chart, in inches. |
STANDARD DRILL SIZES - Inches |
|
Drill
|
|
Decimal |
Drill
|
|
Decimal |
Drill
|
|
Decimal |
Drill
|
|
Decimal |
|
80
|
=
|
.0135
|
43
|
=
|
.089
|
8
|
=
|
.199
|
25/64
|
=
|
.3906
|
|
79
|
=
|
.0145
|
42
|
=
|
.0935
|
7
|
=
|
.201
|
X
|
=
|
.397
|
|
1/64
|
=
|
.0156
|
3/32
|
=
|
.0938
|
13/64
|
=
|
.2031
|
Y
|
=
|
.404
|
|
78
|
=
|
.016
|
41
|
=
|
.096
|
6
|
=
|
.204
|
13/32
|
=
|
.4063
|
|
77
|
=
|
.018
|
40
|
=
|
.098
|
5
|
=
|
.2055
|
Z
|
=
|
.413
|
|
76
|
=
|
.020
|
39
|
=
|
.0995
|
4
|
=
|
.209
|
27/64
|
=
|
.4219
|
|
75
|
=
|
.021
|
38
|
=
|
.1015
|
3
|
=
|
.213
|
7/16
|
=
|
.4375
|
|
74
|
=
|
.0225
|
37
|
=
|
.104
|
7/32
|
=
|
.2188
|
29/64
|
=
|
.4531
|
|
73
|
=
|
.024
|
36
|
=
|
.1065
|
2
|
=
|
.221
|
15/32
|
=
|
.4688
|
|
72
|
=
|
.025
|
7/64
|
=
|
.1094
|
1
|
=
|
.228
|
31/64
|
=
|
.4844
|
|
71
|
=
|
.026
|
35
|
=
|
.110
|
A
|
=
|
.234
|
1/2
|
=
|
.500
|
|
70
|
=
|
.028
|
34
|
=
|
.111
|
15/64
|
=
|
.2344
|
33/64
|
=
|
.5156
|
|
69
|
=
|
.0292
|
33
|
=
|
.113
|
B
|
=
|
.238
|
17/32
|
=
|
.5313
|
|
68
|
=
|
.031
|
32
|
=
|
.116
|
C
|
=
|
.242
|
35/64
|
=
|
.5469
|
|
1/32
|
=
|
.0313
|
31
|
=
|
.120
|
D
|
=
|
.246
|
9/16
|
=
|
.5625
|
|
67
|
=
|
.032
|
1/8
|
=
|
.1250
|
1/4 (E)
|
=
|
.250
|
37/64
|
=
|
.5781
|
|
66
|
=
|
.033
|
30
|
=
|
.1285
|
F
|
=
|
.257
|
19/32
|
=
|
.5938
|
|
65
|
=
|
.035
|
29
|
=
|
.136
|
G
|
=
|
.261
|
39/64
|
=
|
.6094
|
|
64
|
=
|
.036
|
28
|
=
|
.1405
|
17/64
|
=
|
.2656
|
5/8
|
=
|
.625
|
|
63
|
=
|
.037
|
9/64
|
=
|
.1406
|
H
|
=
|
.266
|
41/64
|
=
|
.6406
|
|
62
|
=
|
.038
|
27
|
=
|
.144
|
I
|
=
|
.272
|
21/32
|
=
|
.6563
|
|
61
|
=
|
.039
|
26
|
=
|
.147
|
J
|
=
|
.277
|
43/64
|
=
|
.6719
|
|
60
|
=
|
.040
|
25
|
=
|
.1495
|
K
|
=
|
.281
|
11/16
|
=
|
.6875
|
|
59
|
=
|
.041
|
24
|
=
|
.152
|
9/32
|
=
|
.2813
|
45/64
|
=
|
.7031
|
|
58
|
=
|
.042
|
23
|
=
|
.154
|
L
|
=
|
.290
|
23/32
|
=
|
.7188
|
|
57
|
=
|
.043
|
5/32
|
=
|
.1563
|
M
|
=
|
.295
|
47/64
|
=
|
.7344
|
|
56
|
=
|
.0465
|
22
|
=
|
.157
|
19/64
|
=
|
.2969
|
3/4
|
=
|
.750
|
|
3/64
|
=
|
.0469
|
21
|
=
|
.159
|
N
|
=
|
.302
|
49/64
|
=
|
.7656
|
|
55
|
=
|
.052
|
20
|
=
|
.161
|
5/16
|
=
|
.3125
|
25/32
|
=
|
.7813
|
|
54
|
=
|
.055
|
19
|
=
|
.166
|
O
|
=
|
.316
|
51/64
|
=
|
.7969
|
|
53
|
=
|
.0595
|
18
|
=
|
.1695
|
P
|
=
|
.323
|
13/16
|
=
|
.8125
|
|
1/16
|
=
|
.0625
|
11/64
|
=
|
.1719
|
21/64
|
=
|
.3281
|
53/64
|
=
|
.8281
|
|
52
|
=
|
.0635
|
17
|
=
|
.173
|
Q
|
=
|
.332
|
27/32
|
=
|
.8438
|
|
51
|
=
|
.067
|
16
|
=
|
.177
|
R
|
=
|
.339
|
55/64
|
=
|
.8594
|
|
50
|
=
|
.070
|
15
|
=
|
.180
|
11/32
|
=
|
.3438
|
7/8
|
=
|
.875
|
|
49
|
=
|
.073
|
14
|
=
|
.182
|
S
|
=
|
.348
|
57/64
|
=
|
.8906
|
|
48
|
=
|
.076
|
13
|
=
|
.185
|
T
|
=
|
.358
|
29/32
|
=
|
.9063
|
|
5/64
|
=
|
.0781
|
3/16
|
=
|
.1875
|
23/64
|
=
|
.3594
|
59/64
|
=
|
.9219
|
|
47
|
=
|
.0785
|
12
|
=
|
.189
|
U
|
=
|
.368
|
15/16
|
=
|
.9375
|
|
46
|
=
|
.081
|
11
|
=
|
.191
|
3/8
|
=
|
.375
|
61/64
|
=
|
.9531
|
|
45
|
=
|
.082
|
10
|
=
|
.1935
|
V
|
=
|
.377
|
31/32
|
=
|
.9688
|
|
44
|
=
|
.086
|
9
|
=
|
.196
|
W
|
=
|
.386
|
63/64
|
=
|
.9844
|
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