Drill & Tap Size Chart
Drill
|
Diameter
|
Tap
|
Drill
|
Diameter
|
Tap
|
Drill
|
Diameter
|
Tap
|
Drill
|
Diameter
|
Tap
|
|||
|
80
|
0.0135
|
49
|
0.0730
|
20
|
0.1610
|
I
|
0.2720
|
5/16-24
|
||||||
|
79
|
0.0145
|
48
|
0.0760
|
19
|
0.1660
|
J
|
0.2770
|
|||||||
|
1/64
|
0.0156
|
5/64
|
0.0781
|
18
|
0.1695
|
K
|
0.2810
|
|||||||
|
78
|
0.0160
|
47
|
0.0785
|
3-48
|
11/64
|
0.1719
|
9/32
|
0.2812
|
||||||
|
77
|
0.0180
|
46
|
0.0810
|
17
|
0.1730
|
L
|
0.2900
|
|||||||
|
76
|
0.0200
|
45
|
0.0820
|
3-56
|
16
|
0.1770
|
12-24
|
M
|
0.2950
|
|||||
|
75
|
0.0210
|
44
|
0.0860
|
15
|
0.1800
|
19/64
|
0.2969
|
|||||||
|
74
|
0.0225
|
43
|
0.0890
|
4-40
|
14
|
0.1820
|
12-28
|
N
|
0.3020
|
|||||
|
73
|
0.0240
|
42
|
0.0935
|
4-48
|
13
|
0.1850
|
5/16
|
0.3125
|
3/8-16
|
|||||
|
72
|
0.0250
|
3/32
|
0.0937
|
3/16
|
0.1875
|
O
|
0.3160
|
|||||||
|
71
|
0.0260
|
41
|
0.0960
|
12
|
0.1890
|
P
|
0.3230
|
|||||||
|
70
|
0.0280
|
40
|
0.0980
|
11
|
0.1910
|
21/64
|
0.3281
|
|||||||
|
69
|
0.0292
|
39
|
0.0995
|
10
|
0.1935
|
Q
|
0.3320
|
3/8-24
|
||||||
|
68
|
0.0310
|
38
|
0.1015
|
5-40
|
9
|
0.1960
|
R
|
0.3390
|
||||||
|
1/32
|
0.0312
|
37
|
0.1040
|
5-44
|
8
|
0.1990
|
11/32
|
0.3437
|
||||||
|
67
|
0.0320
|
36
|
0.1065
|
6-32
|
7
|
0.2010
|
1/4-20
|
S
|
0.3480
|
|||||
|
66
|
0.0330
|
7/64
|
0.1094
|
13/64
|
0.2031
|
T
|
0.3580
|
|||||||
|
65
|
0.0350
|
35
|
0.1100
|
6
|
0.2040
|
23/64
|
0.3594
|
|||||||
|
64
|
0.0360
|
34
|
0.1110
|
5
|
0.2055
|
U
|
0.3680
|
7/16-14
|
||||||
|
63
|
0.0370
|
33
|
0.1130
|
6-40
|
4
|
0.2090
|
3/8
|
0.3750
|
||||||
|
62
|
0.0380
|
32
|
0.1160
|
3
|
0.2130
|
1/4-28
|
V
|
0.3770
|
||||||
|
61
|
0.0390
|
31
|
0.1200
|
7/32
|
0.2187
|
W
|
0.3860
|
|||||||
|
60
|
0.0400
|
1/8
|
0.1250
|
2
|
0.2210
|
25/64
|
0.3906
|
7/16-20
|
||||||
|
59
|
0.0410
|
30
|
0.1285
|
1
|
0.2280
|
X
|
0.3970
|
|||||||
|
58
|
0.0420
|
29
|
0.1360
|
8-32,
8-36
|
A
|
0.2340
|
Y
|
0.4040
|
||||||
|
57
|
0.0430
|
28
|
0.1405
|
15/64
|
0.2344
|
13/32
|
0.4062
|
|||||||
|
56
|
0.0465
|
9/64
|
0.1406
|
B
|
0.2380
|
Z
|
0.4130
|
|||||||
|
3/64
|
0.0469
|
0-80
|
27
|
0.1440
|
C
|
0.2420
|
27/64
|
0.4219
|
1/2-13
|
|||||
|
55
|
0.0520
|
26
|
0.1470
|
D
|
0.2460
|
7/16
|
0.4375
|
|||||||
|
54
|
0.0550
|
25
|
0.1495
|
10-24
|
E
|
0.2500
|
29/64
|
0.4531
|
1/2-20
|
|||||
|
53
|
0.0595
|
1-64,
1-72
|
24
|
0.1520
|
1/4
|
0.2500
|
15/32
|
0.4687
|
||||||
|
1/16
|
0.0625
|
23
|
0.1540
|
F
|
0.2570
|
5/16-18
|
31/64
|
0.4844
|
||||||
|
52
|
0.0635
|
5/32
|
0.1562
|
G
|
0.2610
|
1/2
|
0.5000
|
|||||||
|
51
|
0.0670
|
22
|
0.1570
|
17/64
|
0.2656
|
|||||||||
|
50
|
0.0700
|
2-56,
2-64
|
21
|
0.1590
|
10-32
|
H
|
0.2660
|