Fillable Printable Inch/Metric Tap Drill Sizes Chart
Fillable Printable Inch/Metric Tap Drill Sizes Chart
Inch/Metric Tap Drill Sizes Chart
Drill Size
Decimal
eQUiValent
tap Size
80 .0135
1
79 .0145
64
.0156
78 .0160
77 .0180
76 .0200
75 .0210
74 .0225
73 .0240
72 .0250
71 .0260
70 .0280
69 .0292
1
68 .0310
32
.0312
67 .0320
66 .0330
65 .0350
64 .0360
63 .0370
62 .0380
61 .0390
60 .0400
59 .0410
58 .0420
57 .0430
3
56 .0465
64
.0469 0 - 80
55 .0520
54 .0550
1
53 .0595 1 - 64, 72
16
.0625
52 .0635
51 .0670
50 .0700 2 - 56, 64
49 .0730
5
48 .0760
64
.0781
47 .0785 3 - 48
46 .0810
45 .0820 3 - 56
44 .0860
43 .0890 4 - 40
3
42 .0935 4 - 48
32
.0938
41 .0960
40 .0980
39 .0995
38 .1015 5 - 40
37 .1040 5 - 44
7
36 .1065 6 - 32
64
.1094
35 .1100
34 .1110
33 .1130
6 - 40
32 .1160
1
31 .1200
8
.1250
30 .1285
29 .1360
8 - 32, 36
9
28 .1405
64
.1406
27 .1440
26 .1470
25 .1495
10 - 24
24 .1520
5
23 .1540
32
.1562
22 .1570
21 .1590
10 - 32
20 .1610
19 .1660
11
18 .1695
64
.1719
17 .1730
16 .1770
12 - 24
15 .1800
14 .1820
12 - 28
3
13 .1850
16
.1875
12 .1890
11 .1910
metric tap Drill SizeS
metric tap tap Drill (mm) Decimal (inch)
m1.6 x 0.35 1.25 .0492
m1.8 x 0.35 1.45 .0571
m2 x 0.4 1.60 .0630
m2.2 x 0.45 1.75 .0689
m2.5 x 0.45 2.05 .0807
m3 x 0.5 2.50 .0984
m3.5 x 0.6 2.90 .1142
m4 x 0.7 3.30 .1299
m4.5 x 0.75 3.70 .1457
m5 x 0.8 4.20 .1654
m6 x 1 5.00 .1968
m7 x 1 6.00 .2362
m8 x 1.25 6.70 .2638
m8 x 1 7.00 .2756
m10 x 1.5 8.50 .3346
m10 x 1.25 8.70 .3425
m12 x 1.75 10.20 .4016
m12 x 1.25 10.80 .4252
m14 x 2 12.00 .4724
m14 x 1.5 12.50 .4921
m16 x 2 14.00 .5512
m16 x 1.5 14.50 .5709
m18 x 2.5 15.50 .6102
m18 x 1.5 16.50 .6496
m20 x 2.5 17.50 .6890
m20 x 1.5 18.50 .7283
m22 x 2.5 19.50 .7677
m22 x 1.5 20.50 .8071
m24 x 3 21.00 .8268
m24 x 2 22.00 .8661
m27 x 3 24.00 .9449
m27 x 2 25.00 .9843
m30 x 3.5 26.50 1.0433
m30 x 2 28.00 1.1024
m33 x 3.5 29.50 1.1614
m33 x 2 31.00 1.2205
m36 x 4 32.00 1.2598
m36 x 3 33.00 1.2992
m39 x 4 35.00 1.3780
m39 x 3 36.00 1.4173
Drill Size
Decimal
eQUiValent
tap Size
10 .1935
9 .1960
8 .1990
13
7 .2010
1
/
4
- 20
64
.2031
6
.2040
5
.2055
4
.2090
7
3
.2130
1
/
4
- 28
32
.2188
2 .2210
1 .2280
15
a
.2340
64
.2344
B .2380
c .2420
1
D .2460
4
e
.2500
F .2570
5
/
16
- 18
17
G .2610
64
.2656
H .2660
i .2720
5
/
16
- 24
J .2770
9
K .2810
32
.2812
l .2900
19
m .2950
64
.2969
5
n .3020
16
.3125
3
/
8
- 16
O .3160
21
p .3230
64
.3281
Q .3320
3
/
8
- 24
11
r .3390
32
.3438
S .3480
23
t .3580
64
.3594
3
U .3680
7
/
16
- 14
8
.3750
V .3770
25
W .3860
64
.3906
7
/
16
- 20
X .3970
13
Y .4040
32
.4062
27
z .4130
64
7
.4219
1
/
2
- 13
29
16
.4375
64
15
.4531
1
/
2
- 20
31
32
.4688
64
1
.4844
9
/
16
- 12
33
2
.5000
64
17
.5156
9
/
16
- 18
35
32
.5312
5
/
8
- 11
64
9
.5469
37
16
.5625
64
19
.5781
5
/
8
- 18
39
32
.5938
64
5
.6094
41
8
.6250
64
21
.6406
43
32
.6562
3
/
4
- 10
64
11
.6719
45
16
.6875
3
/
4
- 16
64
23
.7031
47
32
.7188
64
3
.7344
49
4
.7500
64
25
.7656
7
/
8
- 9
51
32
.7812
64
13
.7969
53
16
.8125
7
/
8
- 14
64
27
.8281
55
32
.8438
64
7
.8594
57
8
.8750
1 - 8
64
29
.8906
32
.9062
Drill Size
Decimal
eQUiValent
tap Size
59
64
15
.9219
1 - 12
61
16
.9375
1 - 14
64
31
.9531
63
32
.9688
64
.9844
1
1
/
8
- 7
1
1.0000
1
3
/
64
1.0469
1
1
/
8
- 12
1
7
/
64
1.1094
1
1
/
4
- 7
1
1
/
8
1.1250
1
11
/
64
1.1719
1
1
/
4
- 12
1
7
/
32
1.2188
1
3
/
8
- 6
1
1
/
4
1.2500
1
19
/
64
1.2969
1
3
/
8
- 12
1
11
/
32
1.3438
1
1
/
2
- 6
1
3
/
8
1.3750
1
27
/
64
1.4219
1
1
/
2
- 12
1
1
/
2
1.5000
INCH/METRLC TAP DRILL SIZES & DECIMAL EQUIVALENTS
Bulletin 1214-5M/S 05/10
pipe tHreaD SizeS (npSc)
tHreaD Drill tHreaD Drill
1
/
8
– 27
11
/
32
1
1
/
2
– 11
1
/
2
1
3
/
4
1
/
4
– 18
7
/
16
2 – 11
1
/
2
2
7
/
32
3
/
8
– 18
37
/
64
2
1
/
2
– 8 2
21
/
32
1
/
2
– 14
23
/
32
3 – 8 3
1
/
4
3
/
4
– 14
59
/
64
3
1
/
2
– 8 3
3
/
4
1 – 11
1
/
2
1
5
/
32
4 – 8 4
1
/
4
1
1
/
4
– 11
1
/
2
1
1
/
2
