TB 9-4910-745-30
Table 4.
Drill Diameter Conversion Chart
Nominal
Decimal
Decimal
Nominal
size
size
size
size
Inch
Inch
1/16
0.062
19/64
0.296
5/64
5/16
0.078
0.312
3/32
21/64
0.093
0.328
11/32
7/64
00104
0.343
1/8
23/64
0.125
0.359
9/64
3/8
0.140
0.375
25/64
5/32
0.156
0.390
11/64
0.171
13/32
0.406
3/16
27/64
0.187
0.421
13/64
7/16
0.203
0.437
7/32
29/64
0.218
0.453
15/64
15/32
0.234
0.468
31/64
1/4
0.250
0.484
17/64
0.265
1/2
0.500
9/32
0.291
38
