Drill Sizes, Number & Letter
Number &
Letter Drill Sizes
With Metric Alternatives
| Numberor Letter |
Size |
AlternativeRecomended |
| Drill |
Inch |
mm. |
Inch |
| 8079
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28 |
.0135.0145
.0160
.0180
.0200
.0210
.0225
.0240
.0250
.0260
.0280
.0292
.0310
.0320
.0330
.0350
.0360
.0370
.0380
.0390
.0400
.0410
.0420
.0430
.0465
.0520
.0550
.0595
.0635
.0670
.0700
.0730
.0760
.0785
.0810
.0820
.0860
.0890
.0935
.0960
.0980
.0995
.1015
.1040
.1065
.1100
.1110
.1113
.1116
.1200
.1285
.1360
.1405 |
0.350.38
0.40
0.45
0.50
0.52
0.58
0.60
0.65
0.65
0.70
0.75
1/32 in
0.82
0.85
0.90
0.92
0.95
0.98
1.00
1.00
1.05
1.05
1.10
3/64 in
1.30
1.40
1.50
1.60
1.70
1.80
1.85
1.95
2.00
2.05
2.10
2.20
2.25 3/32
in
2.452.50
2.55
2.60
2.65
2.70
2.80
2.80
2.85
2.95
3.00
3.30
3.50
9/64 in |
.0138.0150
.0157
.0177
.0197
.0205
.0228
.0236
.0256
.0256
.0276
.0295
.0312
.0323
.0335
.0354
.0362
.0374
.0386
.0394
.0394
.0413
.0413
.0433
.0469
.0512
.0551
.0590
.0630
.0669
.0709
.0728
.0768
.0787
.0807
.0827
.0866
.0886
.0938
.0965
.0984
.1004
.1024
.1043
.1063
.1102
.1102
.1122
.1161
.1181
.1299
.1378
.1406 |
|
|
| Numberor Letter |
Size |
AlternativeRecomended |
| Drill |
Inch |
mm. |
Inch |
| 2726
25
24
23
22
21
20
19
18
17
16
15
14
13
12
12
10
9
8
7
6
5
4
3
2
1
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z |
.1440.1470
.1495
.1520
.1540
.1570
.1590
.1610
.1660
.1695
.1730
.1770
.1800
.1820
.1850
.1890
.1910
.1935
.1960
.1990
.2010
.2040
.2055
.2090
.2130
.2210
.2280
.2340
.2380
.2420
.2460
.2500
.2570
.2610
.2660
.2720
.2770
.2810
.2900
.2950
.3020
.3160
.3230
.3320
.3390
.3480
.3580
.3680
.3770
.3860
.3970
.4040
.4130 |
3.73.7
3.8
3.9
3.9
4.0
4.0
4.1
4.2
4.3
4.4
4.5
4.6
4.6
4.7
4.8
4.9
4.9 5.0
5.1
5.1
5.2
5.2
5.3
5.4
5.6
5.8
7/32 in
6.0
6.1
6.2
1/4 in
6.5
6.6
17/64 in
6.9
7.0
9/32 in
7.4
7.5
7.7
8.0
8.2
8.4
8.6
8.8
9.1
9.3
3/8 in
9.8
10.1
10.3 10.5 |
.1457.1457
.1496
.1535
.1535
.1575
.1575
.1614
.1654
.1693
.1732
.1772
.1811
.1811
.1850
.1890
.1929
.1929
.1968
.2008
.2008
.2047
.2047
.2087
.2126
.2205
.2283
.2344
.2362
.2402
.2441
.2500
.2559
.2598
.2656
.2717
.2756
.2812
.2913
.2953
.3031
.3150
.3228
.3307
.3386
.3465
.3583
.3661
.3750
.3858
.3976
.4055
.4134 |
|
Switch to our mobile site
