Metric Tap Drill Chart Page 2

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Tap & Clearance Drill Sizes
Tap Drill
Clearance Drill
75% Thread for
50% Thread for
Aluminum, Brass, &
Steel, Stainless,
Close Fit
Free Fit
Screw
Major
Threads
Minor
Plastics
& Iron
Size
Diameter
Per Inch
Diameter
Drill Size
Dec. Eq.
Drill Size
Dec. Eq.
Drill Size
Dec. Eq.
Drill Size
Dec. Eq.
0
.0600
80
.0447
3/64
.0469
55
.0520
52
.0635
50
.0700
64
.0538
53
.0595
1/16
.0625
1
.0730
48
.0760
46
.0810
72
.0560
53
.0595
52
.0635
56
.0641
50
.0700
49
.0730
2
.0860
43
.0890
41
.0960
64
.0668
50
.0700
48
.0760
48
.0734
47
.0785
44
.0860
3
.0990
37
.1040
35
.1100
56
.0771
45
.0820
43
.0890
40
.0813
43
.0890
41
.0960
4
.1120
32
.1160
30
.1285
48
.0864
42
.0935
40
.0980
40
.0943
38
.1015
7/64
.1094
5
.125
30
.1285
29
.1360
44
.0971
37
.1040
35
.1100
32
.0997
36
.1065
32
.1160
6
.138
27
.1440
25
.1495
40
.1073
33
.1130
31
.1200
32
.1257
29
.1360
27
.1440
8
.1640
18
.1695
16
.1770
36
.1299
29
.1360
26
.1470
24
.1389
25
.1495
20
.1610
10
.1900
9
.1960
7
.2010
32
.1517
21
.1590
18
.1695
24
.1649
16
.1770
12
.1890
12
.2160
2
.2210
1
.2280
28
.1722
14
.1820
10
.1935
32
.1777
13
.1850
9
.1960
20
.1887
7
.2010
7/32
.2188
1/4
.2500
28
.2062
3
.2130
1
.2280
F
.2570
H
.2660
32
.2117
7/32
.2188
1
.2280
18
.2443
F
.2570
J
.2770
5/16
.3125
24
.2614
I
.2720
9/32
.2812
P
.3230
Q
.3320
32
.2742
9/32
.2812
L
.2900
16
.2983
5/16
.3125
Q
.3320
3/8
.3750
24
.3239
Q
.3320
S
.3480
W
.3860
X
.3970
32
.3367
11/32
.3438
T
.3580
14
.3499
U
.3680
25/64
.3906
7/16
.4375
20
.3762
25/64
.3906
13/32
.4062
29/64
.4531
15/32
.4687
28
.3937
Y
.4040
Z
.4130
13
.4056
27/64
.4219
29/64
.4531
1/2
.5000
33/64
.5156
17/32
.5312
20
.4387
29/64
.4531
15/32
.4688
28
.4562
15/32
.4688
15/32
.4688
12
.4603
31/64
.4844
33/64
.5156
9/16
.5625
18
.4943
33/64
.5156
17/32
.5312
37/64
.5781
19/32
.5938
24
.5114
33/64
.5156
17/32
.5312
11
.5135
17/32
.5312
9/16
.5625
5/8
.6250
18
.5568
37/64
.5781
19/32
.5938
41/64
.6406
21/32
.6562
24
.5739
37/64
.5781
19/32
.5938
11/16
.6875
24
.6364
41/64
.6406
21/32
.6562
45/64
.7031
23/32
.6562
10
.6273
21/32
.6562
11/16
.6875
3/4
.7500
16
.6733
11/16
.6875
45/64
.7031
49/64
.7656
25/32
.7812
20
.6887
45/64
.7031
23/32
.7188
13/16
.8125
20
.7512
49/64
.7656
25/32
.7812
53/64
.8281
27/32
.8438
9
.7387
49/64
.7656
51/64
.7969
7/8
.8750
14
.7874
13/16
.8125
53/64
.8281
57/64
.8906
29/32
.9062
20
.8137
53/64
.8281
27/32
.8438
15/16
.9375
20
.8762
57/64
.8906
29/32
.9062
61/64
.9531
31/32
.9688
8
.8466
7/8
.8750
59/64
.9219
1
1.000
12
.8978
15/16
.9375
61/64
.9531
1-1/64
1.0156
1-1/32
1.0313
20
.9387
61/64
.9531
31/32
.9688

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