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 28.0
|
3.00
|
24.75
|
M 30.0
|
3.00
|
26.75
|
M 32.0
|
3.00
|
28.75
|
M 33.0
|
3.00
|
29.75
|
M 34.0
|
3.00
|
30.75
|
M 35.0
|
3.00
|
31.75
|
M 36.0
|
3.00
|
32.75
|
M 38.0
|
3.00
|
34.75
|
M 39.0
|
3.00
|
35.75
|
M 40.0
|
3.00
|
36.75
|
M 42.0
|
3.00
|
38.75
|
M 45.0
|
3.00
|
41.75
|
M 48.0
|
3.00
|
44.75
|
M 50.0
|
3.00
|
46.75
|
M 52.0
|
3.00
|
48.75
|
M 55.0
|
3.00
|
51.75
|
M 56.0
|
3.00
|
52.75
|
M 58.0
|
3.00
|
54.75
|
M 60.0
|
3.00
|
56.75
|
M 62.0
|
3.00
|
58.75
|
M 64.0
|
3.00
|
60.75
|
M 65.0
|
3.00
|
61.75
|
M 68.0
|
3.00
|
64.75
|
M 70.0
|
3.00
|
66.75
|
M 72.0
|
3.00
|
68.75
|
M 75.0
|
3.00
|
71.75
|
M 76.0
|
3.00
|
72.75
|
M 78.0
|
3.00
|
74.75
|
M 80.0
|
3.00
|
76.75
|
M 82.0
|
3.00
|
78.75
|
M 85.0
|
3.00
|
81.75
|
M 88.0
|
3.00
|
84.75
|
M 90.0
|
3.00
|
86.75
|
M 92.0
|
3.00
|
88.75
|
M 95.0
|
3.00
|
91.75
|
M 98.0
|
3.00
|
94.75
|
M 100.0
|
3.00
|
96.75
|
M 102.0
|
3.00
|
98.75
|
M 105.0
|
3.00
|
101.75
|
M 108.0
|
3.00
|
104.75
|
M 110.0
|
3.00
|
106.75
|
M 112.0
|
3.00
|
108.75
|
M 115.0
|
3.00
|
111.75
|
M 118.0
|
3.00
|
114.75
|
M 120.0
|
3.00
|
116.75
|
M 122.0
|
3.00
|
118.75
|
M 125.0
|
3.00
|
121.75
|
M 128.0
|
3.00
|
124.75
|
M 130.0
|
3.00
|
126.75
|
M 132.0
|
3.00
|
128.75
|
M 135.0
|
3.00
|
131.75
|
M 138.0
|
3.00
|
134.75
|
M 140.0
|
3.00
|
136.75
|
M 142.0
|
3.00
|
138.75
|
M 145.0
|
3.00
|
141.75
|
M 148.0
|
3.00
|
144.75
|
M 150.0
|
3.00
|
146.75
|
M 152.0
|
3.00
|
148.75
|
M 155.0
|
3.00
|
151.75
|
M 158.0
|
3.00
|
154.75
|
M 160.0
|
3.00
|
156.75
|
M 162.0
|
3.00
|
158.75
|
M 165.0
|
3.00
|
161.75
|
M 168.0
|
3.00
|
164.75
|
M 170.0
|
3.00
|
166.75
|
M 172.0
|
3.00
|
168.75
|
M 175.0
|
3.00
|
171.75
|
M 178.0
|
3.00
|
174.75
|
M 180.0
|
3.00
|
176.75
|
M 182.0
|
3.00
|
178.75
|
M 185.0
|
3.00
|
181.75
|
M 188.0
|
3.00
|
184.75
|
M 190.0
|
3.00
|
186.75
|
M 192.0
|
3.00
|
188.75
|
M 195.0
|
3.00
|
191.75
|
M 198.0
|
3.00
|
194.75
|
M 200.0
|
3.00
|
196.75
|
M 202.0
|
3.00
|
198.75
|
M 205.0
|
3.00
|
201.75
|
M 208.0
|
3.00
|
204.75
|
M 210.0
|
3.00
|
206.75
|
M 212.0
|
3.00
|
208.75
|
M 215.0
|
3.00
|
211.75
|
M 218.0
|
3.00
|
214.75
|
M 220.0
|
3.00
|
216.75
|
M 222.0
|
3.00
|
218.75
|
M 225.0
|
3.00
|
221.75
|
M 228.0
|
3.00
|
224.75
|
M 230.0
|
3.00
|
226.75
|
M 232.0
|
3.00
|
228.75
|
M 235.0
|
3.00
|
231.75
|
M 238.0
|
3.00
|
234.75
|
M 240.0
|
3.00
|
236.75
|
M 242.0
|
3.00
|
238.75
|
M 245.0
|
3.00
|
241.75
|
M 248.0
|
3.00
|
244.75
|
M 250.0
|
3.00
|
246.75
|
M 252.0
|
3.00
|
248.75
|
M 255.0
|
3.00
|
251.75
|
M 258.0
|
3.00
|
254.75
|
M 260.0
|
3.00
|
256.75
|
M 262.0
|
3.00
|
258.75
|
M 265.0
|
3.00
|
261.75
|
M 268.0
|
3.00
|
264.75
|
M 270.0
|
3.00
|
266.75
|
M 272.0
|
3.00
|
268.75
|
M 275.0
|
3.00
|
271.75
|
M 278.0
|
3.00
|
274.75
|
M 280.0
|
3.00
|
276.75
|
M 282.0
|
3.00
|
278.75
|
M 285.0
|
3.00
|
281.75
|
M 288.0
|
3.00
|
284.75
|
M 290.0
|
3.00
|
286.75
|
M 292.0
|
3.00
|
288.75
|
M 295.0
|
3.00
|
291.75
|
M 298.0
|
3.00
|
294.75
|
M 300.0
|
3.00
|
296.75
|