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 M
|
Pitch mm
|
Tapping Drill
Size mm
|
M 40.0
|
4.00
|
35.67
|
M 42.0
|
4.00
|
37.67
|
M 45.0
|
4.00
|
40.67
|
M 48.0
|
4.00
|
43.67
|
M 50.0
|
4.00
|
45.67
|
M 52.0
|
4.00
|
47.67
|
M 55.0
|
4.00
|
50.67
|
M 56.0
|
4.00
|
51.67
|
M 58.0
|
4.00
|
53.67
|
M 60.0
|
4.00
|
55.67
|
M 62.0
|
4.00
|
57.67
|
M 64.0
|
4.00
|
59.67
|
M 65.0
|
4.00
|
60.67
|
M 68.0
|
4.00
|
63.67
|
M 70.0
|
4.00
|
65.67
|
M 72.0
|
4.00
|
67.67
|
M 75.0
|
4.00
|
70.67
|
M 76.0
|
4.00
|
71.67
|
M 78.0
|
4.00
|
73.67
|
M 80.0
|
4.00
|
75.67
|
M 82.0
|
4.00
|
77.67
|
M 85.0
|
4.00
|
80.67
|
M 88.0
|
4.00
|
83.67
|
M 90.0
|
4.00
|
85.67
|
M 92.0
|
4.00
|
87.67
|
M 95.0
|
4.00
|
90.67
|
M 98.0
|
4.00
|
93.67
|
M 100.0
|
4.00
|
95.67
|
M 102.0
|
4.00
|
97.67
|
M 105.0
|
4.00
|
100.67
|
M 108.0
|
4.00
|
103.67
|
M 110.0
|
4.00
|
105.67
|
M 112.0
|
4.00
|
107.67
|
M 115.0
|
4.00
|
110.67
|
M 118.0
|
4.00
|
113.67
|
M 120.0
|
4.00
|
115.67
|
M 122.0
|
4.00
|
117.67
|
M 125.0
|
4.00
|
120.67
|
M 128.0
|
4.00
|
123.67
|
M 130.0
|
4.00
|
125.67
|
M 132.0
|
4.00
|
127.67
|
M 135.0
|
4.00
|
130.67
|
M 138.0
|
4.00
|
133.67
|
M 140.0
|
4.00
|
135.67
|
M 142.0
|
4.00
|
137.67
|
M 145.0
|
4.00
|
140.67
|
M 148.0
|
4.00
|
143.67
|
M 150.0
|
4.00
|
145.67
|
M 152.0
|
4.00
|
147.67
|
M 155.0
|
4.00
|
150.67
|
M 158.0
|
4.00
|
153.67
|
M 160.0
|
4.00
|
155.67
|
M 162.0
|
4.00
|
157.67
|
M 165.0
|
4.00
|
160.67
|
M 168.0
|
4.00
|
163.67
|
M 170.0
|
4.00
|
165.67
|
M 172.0
|
4.00
|
167.67
|
M 175.0
|
4.00
|
170.67
|
M 178.0
|
4.00
|
173.67
|
M 180.0
|
4.00
|
175.67
|
M 182.0
|
4.00
|
177.67
|
M 185.0
|
4.00
|
180.67
|
M 188.0
|
4.00
|
183.67
|
M 190.0
|
4.00
|
185.67
|
M 192.0
|
4.00
|
187.67
|
M 195.0
|
4.00
|
190.67
|
M 198.0
|
4.00
|
193.67
|
M 200.0
|
4.00
|
195.67
|
M 202.0
|
4.00
|
197.67
|
M 205.0
|
4.00
|
200.67
|
M 208.0
|
4.00
|
203.67
|
M 210.0
|
4.00
|
205.67
|
M 212.0
|
4.00
|
207.67
|
M 215.0
|
4.00
|
210.67
|
M 218.0
|
4.00
|
213.67
|
M 220.0
|
4.00
|
215.67
|
M 222.0
|
4.00
|
217.67
|
M 225.0
|
4.00
|
220.67
|
M 228.0
|
4.00
|
223.67
|
M 230.0
|
4.00
|
225.67
|
M 232.0
|
4.00
|
227.67
|
M 235.0
|
4.00
|
230.67
|
M 238.0
|
4.00
|
233.67
|
M 240.0
|
4.00
|
235.67
|
M 242.0
|
4.00
|
237.67
|
M 245.0
|
4.00
|
240.67
|
M 248.0
|
4.00
|
243.67
|
M 250.0
|
4.00
|
245.67
|
M 252.0
|
4.00
|
247.67
|
M 255.0
|
4.00
|
250.67
|
M 258.0
|
4.00
|
253.67
|
M 260.0
|
4.00
|
255.67
|
M 262.0
|
4.00
|
257.67
|
M 265.0
|
4.00
|
260.67
|
M 268.0
|
4.00
|
263.67
|
M 270.0
|
4.00
|
265.67
|
M 272.0
|
4.00
|
267.67
|
M 275.0
|
4.00
|
270.67
|
M 278.0
|
4.00
|
273.67
|
M 280.0
|
4.00
|
275.67
|
M 282.0
|
4.00
|
277.67
|
M 285.0
|
4.00
|
280.67
|
M 288.0
|
4.00
|
283.67
|
M 290.0
|
4.00
|
285.67
|
M 292.0
|
4.00
|
287.67
|
M 295.0
|
4.00
|
290.67
|
M 298.0
|
4.00
|
293.67
|
M 300.0
|
4.00
|
295.67
|