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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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