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 12.0
|
1.5
|
10.38
|
M 13.0
|
1.5
|
11.38
|
M 14.0
|
1.5
|
12.38
|
M 15.0
|
1.5
|
13.38
|
M 16.0
|
1.5
|
14.38
|
M 17.0
|
1.5
|
15.38
|
M 18.0
|
1.5
|
16.38
|
M 19.0
|
1.5
|
17.38
|
M 20.0
|
1.5
|
18.38
|
M 21.0
|
1.5
|
19.38
|
M 22.0
|
1.5
|
20.38
|
M 23.0
|
1.5
|
21.38
|
M 24.0
|
1.5
|
22.38
|
M 25.0
|
1.5
|
23.38
|
M 26.0
|
1.5
|
24.38
|
M 27.0
|
1.5
|
25.38
|
M 28.0
|
1.5
|
26.38
|
M 29.0
|
1.5
|
27.38
|
M 30.0
|
1.5
|
28.38
|
M 31.0
|
1.5
|
29.38
|
M 32.0
|
1.5
|
30.38
|
M 33.0
|
1.5
|
31.38
|
M 34.0
|
1.5
|
32.38
|
M 35.0
|
1.5
|
33.38
|
M 36.0
|
1.5
|
34.38
|
M 37.0
|
1.5
|
35.38
|
M 38.0
|
1.5
|
36.38
|
M 39.0
|
1.5
|
37.38
|
M 40.0
|
1.5
|
38.38
|
M 42.0
|
1.5
|
40.38
|
M 45.0
|
1.5
|
43.38
|
M 48.0
|
1.5
|
46.38
|
M 50.0
|
1.5
|
48.38
|
M 52.0
|
1.5
|
50.38
|
M 55.0
|
1.5
|
53.38
|
M 56.0
|
1.5
|
54.38
|
M 58.0
|
1.5
|
56.38
|
M 60.0
|
1.5
|
58.38
|
M 62.0
|
1.5
|
60.38
|
M 64.0
|
1.5
|
62.38
|
M 65.0
|
1.5
|
63.38
|
M 68.0
|
1.5
|
66.38
|
M 70.0
|
1.5
|
68.38
|
M 72.0
|
1.5
|
70.38
|
M 75.0
|
1.5
|
73.38
|
M 76.0
|
1.5
|
74.38
|
M 78.0
|
1.5
|
76.38
|
M 80.0
|
1.5
|
78.38
|
M 82.0
|
1.5
|
80.38
|
M 85.0
|
1.5
|
83.38
|
M 88.0
|
1.5
|
86.38
|
M 90.0
|
1.5
|
88.38
|
M 92.0
|
1.5
|
90.38
|
M 95.0
|
1.5
|
93.38
|
M 98.0
|
1.5
|
96.38
|
M 100.0
|
1.5
|
98.38
|
M 102.0
|
1.5
|
100.38
|
M 105.0
|
1.5
|
103.38
|
M 108.0
|
1.5
|
106.38
|
M 110.0
|
1.5
|
108.38
|
M 112.0
|
1.5
|
110.38
|
M 115.0
|
1.5
|
113.38
|
M 118.0
|
1.5
|
116.38
|
M 120.0
|
1.5
|
118.38
|
M 122.0
|
1.5
|
120.38
|
M 125.0
|
1.5
|
123.38
|
M 128.0
|
1.5
|
126.38
|
M 130.0
|
1.5
|
128.38
|
M 132.0
|
1.5
|
130.38
|
M 135.0
|
1.5
|
133.38
|
M 138.0
|
1.5
|
136.38
|
M 140.0
|
1.5
|
138.38
|
M 142.0
|
1.5
|
140.38
|
M 145.0
|
1.5
|
143.38
|
M 148.0
|
1.5
|
146.38
|
M 150.0
|
1.5
|
148.38
|
M 152.0
|
1.5
|
150.38
|
M 155.0
|
1.5
|
153.38
|
M 158.0
|
1.5
|
156.38
|
M 160.0
|
1.5
|
158.38
|
M 162.0
|
1.5
|
160.38
|
M 165.0
|
1.5
|
163.38
|
M 168.0
|
1.5
|
166.38
|
M 170.0
|
1.5
|
168.38
|
M 172.0
|
1.5
|
170.38
|
M 175.0
|
1.5
|
173.38
|
M 178.0
|
1.5
|
176.38
|
M 180.0
|
1.5
|
178.38
|
M 182.0
|
1.5
|
180.38
|
M 185.0
|
1.5
|
183.38
|
M 188.0
|
1.5
|
186.38
|
M 190.0
|
1.5
|
188.38
|
M 192.0
|
1.5
|
190.38
|
M 195.0
|
1.5
|
193.38
|
M 198.0
|
1.5
|
196.38
|
M 200.0
|
1.5
|
198.38
|
M 202.0
|
1.5
|
200.38
|
M 205.0
|
1.5
|
203.38
|
M 208.0
|
1.5
|
206.38
|
M 210.0
|
1.5
|
208.38
|
M 212.0
|
1.5
|
210.38
|
M 215.0
|
1.5
|
213.38
|
M 218.0
|
1.5
|
216.38
|
M 220.0
|
1.5
|
218.38
|
M 222.0
|
1.5
|
220.38
|
M 225.0
|
1.5
|
223.38
|
M 228.0
|
1.5
|
226.38
|
M 230.0
|
1.5
|
228.38
|
M 232.0
|
1.5
|
230.38
|
M 235.0
|
1.5
|
233.38
|
M 238.0
|
1.5
|
236.38
|
M 240.0
|
1.5
|
238.38
|
M 242.0
|
1.5
|
240.38
|
M 245.0
|
1.5
|
243.38
|
M 248.0
|
1.5
|
246.38
|
M 250.0
|
1.5
|
248.38
|
M 252.0
|
1.5
|
250.38
|
M 255.0
|
1.5
|
253.38
|
M 258.0
|
1.5
|
256.38
|
M 260.0
|
1.5
|
258.38
|
M 262.0
|
1.5
|
260.38
|
M 265.0
|
1.5
|
263.38
|
M 268.0
|
1.5
|
266.38
|
M 270.0
|
1.5
|
268.38
|
M 272.0
|
1.5
|
270.38
|
M 275.0
|
1.5
|
273.38
|
M 278.0
|
1.5
|
276.38
|
M 280.0
|
1.5
|
278.38
|
M 282.0
|
1.5
|
280.38
|
M 285.0
|
1.5
|
283.38
|
M 288.0
|
1.5
|
286.38
|
M 290.0
|
1.5
|
288.38
|
M 292.0
|
1.5
|
290.38
|
M 295.0
|
1.5
|
293.38
|
M 298.0
|
1.5
|
296.38
|
M 300.0
|
1.5
|
298.38
|
|