Dimensions mm · values as the standard states them Size P s e m b d2 fit d11 d3 d4 h1 h2 mass thread_alt M3 0.5 7.5
h13
≥ 8.15
3
h14
0.8
±0,2
4.5
4.5
H13
≤ 3.15
0.55
0-0,1
0.25
0
0.78
—
M4 0.7 9
h13
≥ 9.83
3.5
h14
0.8
±0,2
6
6
H13
≤ 4.2
0.65
0-0,1
0.35
-0.1
1.13
—
M5 0.8 10
h13
≥ 10.95
4
h14
0.8
±0,2
7
7
H13
≤ 5.25
0.7
0-0,1
0.4
1.73
—
M6 1 11
h13
≥ 12.02
5
h14
0.9
±0,22
8
8
H13
≤ 6.3
0.75
0-0,15
0.4
2.5
—
M8 1.25 14
h13
≥ 15.38
6.5
h14
1
±0,25
10.5
10.5
H13
≤ 8.4
0.9
0-0,15
0.5
0
5.27
M8x1
M10 1.5 17
h13
≥ 18.74
8
h14
1.25
±0,3
12.5
12.5
H13
≤ 10.5
1.15
0-0,2
0.65
-0.15
9.58
M10x1
M12 1.75 19
h13
≥ 20.91
10
h14
1.25
±0,3
14.8
14.8
H13
≤ 12.6
1.4
0-0,2
0.8
13.7
M12x1,5
(M14) 2 22
h13
≥ 24.27
11
h14
1.5
±0,4
16.8
16.8
H13
≤ 14.7
1.8
0-0,2
1
21.3
(M14x1,5)
M16 2 24
h13
≥ 26.51
13
h14
1.5
±0,4
18.8
18.8
H13
≤ 16.8
1.8
0-0,2
1
28.5
M16x1,5
Ranges read min – max; ≤ / ≥ where the standard gives one limit, ≈ for approximate values. Sizes in (brackets) are non-preferred. Select a row for its size sheet.
Size sheet · DIN 929
M3
s width across flats 7.5
e width across corners ≥ 8.15
m height of the nut 3
b 0.8
d2 diameter of the weld (fit d11) 4.5
d3 4.5
d4 ≤ 3.15
h1 0.55
h2 0.25
mass mass per 1000 pieces (kg) 0.78 Thread · ISO 261/262
Pitch P 0.5
d2 2.675
d3 2.387
Tap drill 2.5
Stress area As 5.03 mm² Size sheet · DIN 929
M4
s width across flats 9
e width across corners ≥ 9.83
m height of the nut 3.5
b 0.8
d2 diameter of the weld (fit d11) 6
d3 6
d4 ≤ 4.2
h1 0.65
h2 0.35
mass mass per 1000 pieces (kg) 1.13 Thread · ISO 261/262
Pitch P 0.7
d2 3.545
d3 3.141
Tap drill 3.3
Stress area As 8.78 mm² Size sheet · DIN 929
M5
s width across flats 10
e width across corners ≥ 10.95
m height of the nut 4
b 0.8
d2 diameter of the weld (fit d11) 7
d3 7
d4 ≤ 5.25
h1 0.7
h2 0.4
mass mass per 1000 pieces (kg) 1.73 Thread · ISO 261/262
Pitch P 0.8
d2 4.48
d3 4.019
Tap drill 4.2
Stress area As 14.18 mm² Size sheet · DIN 929
M6
s width across flats 11
e width across corners ≥ 12.02
m height of the nut 5
b 0.9
d2 diameter of the weld (fit d11) 8
d3 8
d4 ≤ 6.3
h1 0.75
h2 0.4
mass mass per 1000 pieces (kg) 2.5 Thread · ISO 261/262
Pitch P 1
d2 5.35
d3 4.773
Tap drill 5
Stress area As 20.12 mm² Size sheet · DIN 929
M8
s width across flats 14
e width across corners ≥ 15.38
m height of the nut 6.5
b 1
d2 diameter of the weld (fit d11) 10.5
d3 10.5
d4 ≤ 8.4
h1 0.9
h2 0.5
mass mass per 1000 pieces (kg) 5.27
thread_alt alternative / fine thread M8x1 Thread · ISO 261/262
Pitch P 1.25
d2 7.188
d3 6.466
Tap drill 6.75
Stress area As 36.61 mm² Size sheet · DIN 929
M10
s width across flats 17
e width across corners ≥ 18.74
m height of the nut 8
b 1.25
d2 diameter of the weld (fit d11) 12.5
d3 12.5
d4 ≤ 10.5
h1 1.15
h2 0.65
mass mass per 1000 pieces (kg) 9.58
thread_alt alternative / fine thread M10x1 Thread · ISO 261/262
Pitch P 1.5
d2 9.026
d3 8.16
Tap drill 8.5
Stress area As 57.99 mm² Size sheet · DIN 929
M12
s width across flats 19
e width across corners ≥ 20.91
m height of the nut 10
b 1.25
d2 diameter of the weld (fit d11) 14.8
d3 14.8
d4 ≤ 12.6
h1 1.4
h2 0.8
mass mass per 1000 pieces (kg) 13.7
thread_alt alternative / fine thread M12x1,5 Thread · ISO 261/262
Pitch P 1.75
d2 10.863
d3 9.853
Tap drill 10.25
Stress area As 84.27 mm² Size sheet · DIN 929
M14
s width across flats 22
e width across corners ≥ 24.27
m height of the nut 11
b 1.5
d2 diameter of the weld (fit d11) 16.8
d3 16.8
d4 ≤ 14.7
h1 1.8
h2 1
mass mass per 1000 pieces (kg) 21.3
thread_alt alternative / fine thread (M14x1,5) Thread · ISO 261/262
Pitch P 2
d2 12.701
d3 11.546
Tap drill 12
Stress area As 115.44 mm² Size sheet · DIN 929
M16
s width across flats 24
e width across corners ≥ 26.51
m height of the nut 13
b 1.5
d2 diameter of the weld (fit d11) 18.8
d3 18.8
d4 ≤ 16.8
h1 1.8
h2 1
mass mass per 1000 pieces (kg) 28.5
thread_alt alternative / fine thread M16x1,5 Thread · ISO 261/262
Pitch P 2
d2 14.701
d3 13.546
Tap drill 14
Stress area As 156.67 mm² Provenance
Draft — values taken from a single source and not yet cross-checked.
fasteners.eu dimensions, lengths, materials, property classes, current norm, equivalent norms Accessed 2026-09-23 · For design and safety-critical use, consult the current edition of the standard.