Compared to standard threads, a fine thread has
a smaller pitch which increases the resilience. It is used e.g. for adjusting
screws in measuring instruments because it allows for finer settings. The term
consists of the letter M, the nominal diameter and the pitch, the flank angle
is 60°
Nominal Diameter mm
|
Pitch mm
|
Tapping Drill
Size mm
|
M 5.0
|
0.75
|
4.19
|
M 5.5
|
0.75
|
4.69
|
M 6.0
|
0.75
|
5.19
|
M 6.5
|
0.75
|
5.69
|
M 7.0
|
0.75
|
6.19
|
M 7.5
|
0.75
|
6.69
|
M 8.0
|
0.75
|
7.19
|
M 8.5
|
0.75
|
7.69
|
M 9.0
|
0.75
|
8.19
|
M 9.5
|
0.75
|
8.69
|
M 10.0
|
0.75
|
9.19
|
M 10.5
|
0.75
|
9.69
|
M 11.0
|
0.75
|
10.19
|
M 11.5
|
0.75
|
10.69
|
M 12.0
|
0.75
|
11.19
|
M 12.5
|
0.75
|
11.69
|
M 13.0
|
0.75
|
12.19
|
M 13.5
|
0.75
|
12.69
|
M 14.0
|
0.75
|
13.19
|
M 14.5
|
0.75
|
13.69
|
M 15.0
|
0.75
|
14.19
|
M 16.0
|
0.75
|
15.19
|
M 17.0
|
0.75
|
16.19
|
M 18.0
|
0.75
|
17.19
|
M 19.0
|
0.75
|
18.19
|
M 20.0
|
0.75
|
19.19
|
M 21.0
|
0.75
|
20.19
|
M 22.0
|
0.75
|
21.19
|
M 23.0
|
0.75
|
22.19
|
M 24.0
|
0.75
|
23.19
|
M 25.0
|
0.75
|
24.19
|
M 26.0
|
0.75
|
25.19
|
M 27.0
|
0.75
|
26.19
|
M 28.0
|
0.75
|
27.19
|
M 29.0
|
0.75
|
28.19
|
M 30.0
|
0.75
|
29.19
|
M 31.0
|
0.75
|
30.19
|
M 32.0
|
0.75
|
31.19
|
M 33.0
|
0.75
|
32.19
|
M 34.0
|
0.75
|
33.19
|
M 35.0
|
0.75
|
34.19
|
M 36.0
|
0.75
|
35.19
|
M 37.0
|
0.75
|
36.19
|
M 38.0
|
0.75
|
37.19
|
M 39.0
|
0.75
|
38.19
|
M 40.0
|
0.75
|
39.19
|
M 41.0
|
0.75
|
40.19
|
M 42.0
|
0.75
|
41.19
|
M 43.0
|
0.75
|
42.19
|
M 44.0
|
0.75
|
43.19
|
M 45.0
|
0.75
|
44.19
|
M 46.0
|
0.75
|
45.19
|
M 47.0
|
0.75
|
46.19
|
M 48.0
|
0.75
|
47.19
|
M 49.0
|
0.75
|
48.19
|
M 50.0
|
0.75
|
49.19
|
M 51.0
|
0.75
|
50.19
|
M 52.0
|
0.75
|
51.19
|
M 53.0
|
0.75
|
52.19
|
M 54.0
|
0.75
|
53.19
|
M 55.0
|
0.75
|
54.19
|
M 56.0
|
0.75
|
55.19
|
M 57.0
|
0.75
|
56.19
|
M 58.0
|
0.75
|
57.19
|
M 59.0
|
0.75
|
58.19
|
M 60.0
|
0.75
|
59.19
|
M 61.0
|
0.75
|
60.19
|
M 62.0
|
0.75
|
61.19
|
M 63.0
|
0.75
|
62.19
|
M 64.0
|
0.75
|
63.19
|
M 65.0
|
0.75
|
64.19
|
M 66.0
|
0.75
|
65.19
|
M 67.0
|
0.75
|
66.19
|
M 68.0
|
0.75
|
67.19
|
M 69.0
|
0.75
|
68.19
|
M 70.0
|
0.75
|
69.19
|
M 72.0
|
0.75
|
71.19
|
M 75.0
|
0.75
|
74.19
|
M 76.0
|
0.75
|
75.19
|
M 78.0
|
0.75
|
77.19
|
M 80.0
|
0.75
|
79.19
|
M 82.0
|
0.75
|
81.19
|
M 85.0
|
0.75
|
84.19
|
M 88.0
|
0.75
|
87.19
|
M 90.0
|
0.75
|
89.19
|
M 92.0
|
0.75
|
91.19
|
M 95.0
|
0.75
|
94.19
|
M 98.0
|
0.75
|
97.19
|
M 100.0
|
0.75
|
99.19
|
M 102.0
|
0.75
|
101.19
|
M 105.0
|
0.75
|
104.19
|
M 108.0
|
0.75
|
107.19
|
M 110.0
|
0.75
|
109.19
|
|