01/11/2017
Threads - Metric ISO 724
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Threads - Metric ISO 724 M Thread (metric ISO 724 thread) European Standard Sponsored Links
The European Standard M Thread - ISO 724:1993 "ISO general-purpose metric screw threads -- Basic dimensions" (DIN 13) is recognizable by its cylindrical outer and inner diameter in millimeters. There are three kinds of ISO metric threads: coarse fine extra fine The thread angle is 60o. The thread depth is 0.614 x pitch.
Designation Metric threads are designated with a capital M plus an indication to their nominal outer diameter and their pitch: M size x pitch Example: M10 x 1.5
Metric Threads - Coarse Thread Pitches
1)
Size - Nominal Diameter (mm)
Pitch1) (mm)
Clearance Drill (mm)
Tap Drill (mm)
M 1.60
0.35
1.8
1.25
M 2.00
0.40
2.4
1.60
M 2.50
0.45
2.90
2.00
M 3.00
0.50
3.40
2.50
M 3.50
0.60
3.90
2.90
M 4.00
0.70
4.50
3.30
M 5.00
0.80
5.50
4.20
M 6.00
1.00
6.60
5.00
M 8.00
1.25
9.00
6.80
M 10.00
1.50
12.00
8.50
M 12.00
1.75
14.00
10.20
M 14.00
2.00
16.00
12.00
M 16.00
2.00
18.00
14.00
M 20.00
2.50
22.00
17.50
M 22.00
2.50
25.00
19.50
M 24.00
3.00
27.00
21.00
M 27.00
3.00
30.00
24.00
M 30.00
3.50
33.00
26.50
M 36.00
4.00
40.00
32.00
M 42.00
4.50
46.00
37.50
M 48.00
5.00
53.00
43.00
M 56.00
5.50
62.00
50.50
M 64.00
6.00
70.00
58.00
M 68.00
6.00
74.00
62.00
For metric threads pitch is the distance between threads. 1 mm ~= 0.03937 inches
Metric Threads - Fine Thread Pitches Size - Nominal Diameter (mm)
Pitch1) (mm)
Tap Drill (mm)
M 1.0 x 0.2
0.20
0.80
M 1.1 x 0.2
0.20
0.90
M 1.2 x 0.2
0.20
1.00
M 1.4 x 0.2
0.20
1.20
M 1.6 x 0.2
0.20
1.40
M 1.8 x 0.2
0.20
1.60
M 2 x 0.25
0.25
1.75
M 2.2 x 0.25
0.25
1.95
M 2.5 x 0.35
0.35
2.10
M 3 x 0.35
0.35
2.60
M 3.5 x 0.35
0.35
3.10
M 4 x 0.5
0.50
3.50
M 4.5 x 0.5
0.50
4.00
M 5 x 0.5
0.50
4.50
M 5.5 x 0.5
0.50
5.00
M 6 x 0.75
0.75
5.20
M 7 x 0.75
0.75
6.20
M 8 x 0.75
0.75
7.20
M 8 x 1.0
1.00
7.00
M 9 x 0.75
0.75
8.20
M9x1
1.00
8.00
M 10 x 0.75
0.75
9.20
M 10 x 1
1.00
9.00
M 10 x 1.25
1.25
8.80
M 11 x 0.75
0.75
10.20 10.00
M 11 x 1
1.00
M 12 x 1
1.00
11.00
M 12 x 1.25
1.25
10.80
M 12 x 1.5
1.50
10.50
M 14 x 1.0
1.00
13.00
M 14 x 1.25
1.25
12.80
M 14 x 1.5
1.50
12.50
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Threads - Metric ISO 724 Size - Nominal Diameter (mm)
Pitch1) (mm)
Tap Drill (mm)
M 15 x 1
1.00
14.00
M 15 x 1.5
1.50
13.50
M 16 x 1
1.00
15.00
M 16 x 1.5
1.50
14.50
M 17 x 1.0
1.00
16.00
M 17 x 1.5
1.50
15.50
M 18 x 1.0
1.00
17.00
M 18 x 1.5
1.50
16.50
M 18 x 2.0
2.00
16.00
M 20 x 1.0
1.00
19.00
M 20 x 1.5
1.50
18.50
M 20 x 2.0
2.00
18.00
M 22 x 1.0
1.00
21.00
M 22 x 1.5
1.50
20.50
M 22 x 2.0
2.00
20.00
M 24 x 1.0
1.00
23.00
M 24 x 1.5
1.50
22.50
M 24 x 2.0
2.00
22.00
M 25 x 1.0
1.00
24.00
M 25 x 1.5
1.50
23.50
M 25 x 2.0
2.00
23.00
M 27 x 1.0
1.00
26.00
M 27 x 1.5
1.50
25.50
M 27 x 2.0
2.00
25.00
M 28 x 1.0
1.00
27.00
M 28 x 1.5
1.50
26.50
M 28 x 2.0
2.00
26.00
M 30 x 1.0
1.00
29.00
M 30 x 1.5
1.50
28.50
M 30 x 2.0
2.00
28.00
M 30 x 3.0
3.00
27.00
M 32 x 1.5
1.50
30.50
M 32 x 2.0
2.00
30.00
M 33 x 1.5
1.50
31.50
M 33 x 2.0
2.00
31.00
M 33 x 3.0
3.00
30.00
M 35 x 1.5
1.50
33.50
M 35 x 2.0
2.00
33.00
M 36 x 1.5
1.50
34.50
M 36 x 2.0
2.00
34.00
M 36 x 3.0
3.00
33.00
M 39 x 1.5
1.50
37.50
M 39 x 2.0
2.00
37.00
M 39 x 3.0
3.00
36.00
M 40 x 1.5
1.50
38.50
M 40 x 2.0
2.00
38.00
M 40 x 3.0
3.00
37.00
M 42 x 1.5
1.50
40.50
M 42 x 2.0
2.00
40.00
M 42 x 3.0
3.00
39.00
M 42 x 4.0
4.00
38.00
M 45 x 1.5
1.50
43.50
M 45 x 2.0
2.00
43.00
M 45 x 3.0
3.00
42.00
M 45 x 4.0
4.00
41.00
M 48 x 1.5
1.50
46.50
M 48 x 2.0
2.00
46.00
M 48 x 3.0
3.00
45.00
M 48 x 4.0
4.00
44.00
M 50 x 1.5
1.50
48.50
M 50 x 2.0
2.00
48.00
M 50 x 3.0
3.00
47.00
M 52 x 1.5
1.50
50.50
M 52 x 2.0
2.00
50.00
M 52 x 3.0
3.00
49.00
M 52 x 4.0
4.00
48.00
M 55 x 1.5
1.50
53.50
M 55 x 2.0
2.00
53.00
M 55 x 3.0
3.00
52.00
M 55 x 4.0
4.00
51.00
M 56 x 1.5
1.50
54.50
M 56 x 2.0
2.00
54.00
M 56 x 3.0
3.00
53.00
M 56 x 4.0
4.00
52.00
M 58 x 1.5
1.50
56.50
M 58 x 2.0
2.00
56.00
M 58 x 3.0
3.00
55.00
M 58 x 4.0
4.00
54.00
M 60 x 1.5
1.50
58.50
M 60 x 2.0
2.00
58.00
M 60 x 3.0
3.00
57.00
M 60 x 4.0
4.00
56.00
M 62 x 1.5
1.50
60.50
M 62 x 2.0
2.00
60.00
M 62 x 3.0
3.00
59.00
M 62 x 4.0
4.00
58.00
M 64 x 1.5
1.50
62.50
M 64 x 2.0
2.00
62.00
M 64 x 3.0
3.00
61.00
M 64 x 4.0
4.00
60.00
M 65 x 1.5
1.50
63.50
M 65 x 2.0
2.00
63.00
M 65 x 3.0
3.00
62.00
M 65 x 4.0
4.00
61.00
M 68 x 1.5
1.50
66.50
M 68 x 2.0
2.00
66.00
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Threads - Metric ISO 724 Size - Nominal Diameter (mm)
Pitch1) (mm)
Tap Drill (mm)
M 68 x 3.0
3.00
65.00
M 68 x 4.0
4.00
64.00
M 70 x 1.5
1.50
68.50
M 70 x 2.0
2.00
68.00
M 70 x 3.0
3.00
67.00
M 70 x 4.0
4.00
66.00
M 70 x 6.0
6.00
64.00
M 72 x 1.5
1.50
70.50
M 72 x 2.0
2.00
70.00
M 72 x 3.0
3.00
69.00
M 72 x 4.0
4.00
68.00
M 72 x 6.0
6.00
66.00
M 75 x 1.5
1.50
73.50
M 75 x 2.0
2.00
73.00
M 75 x 3.0
3.00
72.00
M 75 x 4.0
4.00
71.00
M 75 x 6.0
6.00
69.00
M 76 x 1.5
1.50
74.50
M 76 x 2.0
2.00
74.00
M 76 x 3.0
3.00
73.00
M 76 x 4.0
4.00
72.00
M 76 x 6.0
6.00
70.00
M 80 x 1.5
1.50
78.50
M 80 x 2.0
2.00
78.00
M 80 x 3.0
3.00
77.00
M 80 x 4.0
4.00
76.00
M 80 x 6.0
6.00
74.00
M 85 x 2.0
2.00
83.00
M 85 x 3.0
3.00
82.00
M 85 x 4.0
4.00
81.00
M 85 x 6.0
6.00
79.00
M 90 x 2.0
2.00
88.00
M 90 x 3.0
3.00
87.00
M 90 x 4.0
4.00
86.00
M 90 x 6.0
6.00
84.00
M 95 x 2.0
2.00
93.00
M 95 x 3.0
3.00
92.00
M 95 x 4.0
4.00
91.00
M 95 x 6.0
6.00
89.00
M 100 x 2.0
2.00
98.00
M 100 x 3.0
3.00
97.00
M 100 x 4.0
4.00
96.00
M 100 x 6.0
6.00
94.00
Related ISO Standards ISO 68:1973 ISO general purpose screw threads - Basic profile ISO 261:1973 ISO general purpose metric screw threads - General plan ISO 262:1973 ISO general purpose metric screw threads - Selected sizes for screws, bolts and nuts ISO 724:1993 ISO general-purpose metric screw threads - Basic dimensions ISO 965-1:1980 ISO general purpose metric screw threads - Tolerances - Part 1: Principles and basic data ISO 965-2:1980 ISO general purpose metric screw threads - Tolerances - Part 2: Limits of sizes for general purpose bolt and nut threads - Medium quality ISO 965-3:1980 ISO general purpose metric screw threads - Tolerances - Part 3: Deviations for constructional threads ISO 1502:1996 ISO general-purpose metric screw threads - Gauges and gauging
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Threads - Metric ISO 724
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Threads - Metric ISO 724
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