Figuring out Size, Pitch and Tapping Drill Size 

SIZE PITCH

TAPPING

DRILL SIZE (mm)

2 0.4 1.6
2.5 0.45 2.05
3 0.5 2.5
3.5 0.6 2.9
4 0,7 3.3
4.5 0.75 3.7
5 0.8 4.2
6 1 5
7 1 6
8 1.25 6.8
9 1.25 7.8
10 1.5 8.5
11 1.5 9.5
12 1.75 10.2
14 2 12
16 2 14
18 2.5 15.5
20 2.5 17.5
22 2.5 19.5
24 3 21
27 3 24
30 3.5 26.5
32 3.5 28.5
33 3.5 29.5
36 4 32
39 4 35
42 4.5 37.5
45 4.5 40.5
48 5 43
52 5 47
56 5.5 50.5

 

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