tap drill chart metric

Metric Coarse Sizes

Tap Size Drill Size
1 x .25 0.75
1.1 x .25 0.85
1.2 x .25 0.95
1.4 x .3 1.1
1.6 x .35 1.25
1.7 x .35 1.3
1.8 x .35 1.45
2 x .4 1.6
2.2 x .45 1.75
2.5 x .45 2.05
3 x .5 2.5
3.5 x .6 2.9
4 x .7 3.3
4.5 x .75 3.7
5 x .8 4.2
6 x 1 5
7 x 1 6
8 x 1.25 6.8
9 x 1.25 7.8
10 x 1.5 8.5
11 x 1.5 9.5
12 x 1.75 10.2
14 x 2 12
16 x 2 14
18 x 2.5 15.5
20 x 2.5 17.5
22 x 2.5 19.5
24 x 3 21
27 x 3 24
30 x 3.5 26.5
33 x 3.5 29.5
36 x 4 32
39 x 4 35

Metric Fine Sizes

Tap SizeDrill Size
4 x .353.6
4 x .53.5
5 x .54.5
6 x .55.5
6 x .755.25
7 x .756.25
8 x .57.5
8 x .757.25
8 x 17
9 x 18
10 x .759.25
10 x 19
10 x 1.258.8
11 x 110
12 x .7511.25
12 x 111
12 x 1.510.5
14 x 113
14 x 1.2512.8
14 x 1.512.5
16 x 115
16 x 1.514.5
18 x 117
18 x 216
20 x 119
20 x 1.518.5
20 x 218
22 x 121
22 x 1.520.5
22 x 220
24 x 1.522.5
24 x 222
26 x 1.524.5
27 x 1.525.5
27 x 225
28 x 1.526.5
30 x 1.528.5
30 x 228
33 x 231
36 x 333
39 x 336