Related Resources: hardware
ISO tap and drill size table chart, fine thread series
Engineering ANSI Hardware Design Data
Engineering Metric Hardware Design Data
ISO metric tapping and clearance drills table chart, fine thread series
|
Nominal
size |
Tapping drill size
(mm) |
Clearance drill size
(mm) |
|||
|
Recommended
80% engagement |
Alternative
70% entengagement |
Close
fit |
Medium
fit |
Free
fit |
|
|
M6
|
5.20
|
5.30
|
6.4
|
6.6
|
7.0
|
|
M8
|
7.00
|
7.10
|
8.4
|
9.0
|
10.0
|
|
M10
|
8.80
|
8.90
|
10.5
|
11.0
|
12.0
|
|
M12
|
10.80
|
10.90
|
13.0
|
14.0
|
15.0
|
|
M14
|
12.50
|
12.70
|
15.0
|
16.0
|
17.0
|
|
M16
|
14.50
|
14.75
|
17.0
|
18.0
|
19.0
|
|
M18
|
16.50
|
16.75
|
19.0
|
20.0
|
21.0
|
|
M20
|
18.50
|
18.75
|
21.0
|
22.0
|
24.0
|
|
M22
|
20.50
|
20.75
|
23.0
|
24.0
|
26.0
|
|
M24
|
22.00
|
22.25
|
25.0
|
26.0
|
28.0
|
|
M27
|
25.00
|
25.25
|
28.0
|
30.0
|
32.0
|
|
M30
|
28.00
|
28.25
|
31.0
|
33.0
|
35.0
|
|
M33
|
31.00
|
31.25
|
34.0
|
36.0
|
38.0
|
|
M36
|
33.00
|
–
|
37.0
|
39.0
|
42.0
|
|---|---|---|---|---|---|
|
M39
|
36.00
|
–
|
40.0
|
42.0
|
45.0
|
|
M42
|
39.00
|
–
|
43.0
|
45.0
|
48.0
|
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