Look
here for metric thread size M4 to M18 +
spanner + pitch information
|
Tap
Size
mm .
|
Drill
Size
mm.
|
|
2.3
2.6
3.0
3.5
4.0
4.5
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
|
1.9
2.1
2.5
2.9
3.3
3.8
4.2
5.0
6.0
6.8
7.9
8.5
9.5
10.2
|
|
Tap
Size
mm .
|
Drill
Size
mm.
|
Go to a
unit starting with
-
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