Dimensions mm · values as the standard states them Size P s e t df dp M1.4 0.3 0.7
0.711 – 0.724
≥ 0.803
≥ 0.6
≈ Lowerlimitofminorthreaddiameter
0.45 – 0.7
M1.6 0.35 0.7
0.711 – 0.724
≥ 0.803
≥ 0.7
≈ Lowerlimitofminorthreaddiameter
0.55 – 0.8
(M1.8) 0.35 0.7
0.711 – 0.724
≥ 0.803
≥ 0.8
≈ Lowerlimitofminorthreaddiameter
0.65 – 0.9
M2 0.4 0.9
0.889 – 0.902
≥ 1.003
≥ 0.8
≈ Lowerlimitofminorthreaddiameter
0.75 – 1
M2.5 0.45 1.3
1.27 – 1.295
≥ 1.427
≥ 1.2
≈ Lowerlimitofminorthreaddiameter
1.25 – 1.5
M3 0.5 1.5
1.52 – 1.545
≥ 1.73
≥ 1.2
≈ Lowerlimitofminorthreaddiameter
1.75 – 2
M4 0.7 2
2.02 – 2.045
≥ 2.3
≥ 1.5
≈ Lowerlimitofminorthreaddiameter
2.25 – 2.5
M5 0.8 2.5
2.52 – 2.56
≥ 2.87
≥ 2
≈ Lowerlimitofminorthreaddiameter
3.2 – 3.5
M6 1 3
3.02 – 3.08
≥ 3.44
≥ 2
≈ Lowerlimitofminorthreaddiameter
3.7 – 4
M8 1.25 4
4.02 – 4.095
≥ 4.58
≥ 3
≈ Lowerlimitofminorthreaddiameter
5.2 – 5.5
M10 1.5 5
5.02 – 5.095
≥ 5.72
≥ 4
≈ Lowerlimitofminorthreaddiameter
6.64 – 7
M12 1.75 6
6.02 – 6.095
≥ 6.86
≥ 4.8
≈ Lowerlimitofminorthreaddiameter
8.14 – 8.5
(M14) 2 6
6.02 – 6.095
≥ 6.86
≥ 5.6
≈ Lowerlimitofminorthreaddiameter
9.64 – 10
M16 2 8
8.025 – 8.115
≥ 9.15
≥ 6.4
≈ Lowerlimitofminorthreaddiameter
11.57 – 12
(M18) 2.5 10
10.025 – 10.115
≥ 11.43
≥ 7.2
≈ Lowerlimitofminorthreaddiameter
12.57 – 13
M20 2.5 10
10.025 – 10.115
≥ 11.43
≥ 8
≈ Lowerlimitofminorthreaddiameter
14.57 – 15
(M22) 2.5 12
12.032 – 12.142
≥ 13.72
≥ 9
≈ Lowerlimitofminorthreaddiameter
16.57 – 17
M24 3 12
12.032 – 12.142
≥ 13.72
≥ 10
≈ Lowerlimitofminorthreaddiameter
17.57 – 18
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.
Length tolerances 2 1.8 – 2.2
2.5 2.3 – 2.7
3 2.8 – 3.2
3.5 3.26 – 3.74
4 3.76 – 4.24
5 4.76 – 5.24
6 5.76 – 6.24
8 7.71 – 8.29
10 9.71 – 10.29
12 11.65 – 12.35
14 13.65 – 14.35
16 15.65 – 16.35
18 17.65 – 18.35
20 19.58 – 20.42
22 21.58 – 22.42
25 24.58 – 25.42
28 27.58 – 28.42
30 29.58 – 30.42
35 34.5 – 35.5
40 39.5 – 40.5
45 44.5 – 45.5
50 49.5 – 50.5
55 54.4 – 55.6
60 59.4 – 60.6
Size sheet · DIN 913
M1.4
s width across flats 0.7
e width across corners ≥ 0.803
t groove depth ≥ 0.6
df ≈ Lowerlimitofminorthreaddiameter
dp diameter of the ejector 0.45 – 0.7 Thread · ISO 261/262
Pitch P 0.3
d2 1.205
d3 1.032
Tap drill 1.1
Stress area As 0.98 mm² Standard lengths
2.5 · 3 · 4 · 5 · 6
Size sheet · DIN 913
M1.6
s width across flats 0.7
e width across corners ≥ 0.803
t groove depth ≥ 0.7
df ≈ Lowerlimitofminorthreaddiameter
dp diameter of the ejector 0.55 – 0.8 Thread · ISO 261/262
Pitch P 0.35
d2 1.373
d3 1.171
Tap drill 1.25
Stress area As 1.27 mm² Standard lengths
2.5 · 3 · 4 · 5 · 6
Size sheet · DIN 913
M1.8
s width across flats 0.7
e width across corners ≥ 0.803
t groove depth ≥ 0.8
df ≈ Lowerlimitofminorthreaddiameter
dp diameter of the ejector 0.65 – 0.9 Thread · ISO 261/262
Pitch P 0.35
d2 1.573
d3 1.371
Tap drill 1.45
Stress area As 1.7 mm² Standard lengths
2.5 · 3 · 4 · 5 · 6
Size sheet · DIN 913
M2
s width across flats 0.9
e width across corners ≥ 1.003
t groove depth ≥ 0.8
df ≈ Lowerlimitofminorthreaddiameter
dp diameter of the ejector 0.75 – 1 Thread · ISO 261/262
Pitch P 0.4
d2 1.74
d3 1.509
Tap drill 1.6
Stress area As 2.07 mm² Standard lengths
3 · 4 · 5 · 6 · 8 · 10
Size sheet · DIN 913
M2.5
s width across flats 1.3
e width across corners ≥ 1.427
t groove depth ≥ 1.2
df ≈ Lowerlimitofminorthreaddiameter
dp diameter of the ejector 1.25 – 1.5 Thread · ISO 261/262
Pitch P 0.45
d2 2.208
d3 1.948
Tap drill 2.05
Stress area As 3.39 mm² Standard lengths
3 · 4 · 5 · 6 · 8 · 10
Size sheet · DIN 913
M3
s width across flats 1.5
e width across corners ≥ 1.73
t groove depth ≥ 1.2
df ≈ Lowerlimitofminorthreaddiameter
dp diameter of the ejector 1.75 – 2 Thread · ISO 261/262
Pitch P 0.5
d2 2.675
d3 2.387
Tap drill 2.5
Stress area As 5.03 mm² Standard lengths
3 · 4 · 5 · 6 · 8 · 10 · 12 · 16 · 20
Size sheet · DIN 913
M4
s width across flats 2
e width across corners ≥ 2.3
t groove depth ≥ 1.5
df ≈ Lowerlimitofminorthreaddiameter
dp diameter of the ejector 2.25 – 2.5 Thread · ISO 261/262
Pitch P 0.7
d2 3.545
d3 3.141
Tap drill 3.3
Stress area As 8.78 mm² Standard lengths
4 · 5 · 6 · 8 · 10 · 12 · 16 · 20
Size sheet · DIN 913
M5
s width across flats 2.5
e width across corners ≥ 2.87
t groove depth ≥ 2
df ≈ Lowerlimitofminorthreaddiameter
dp diameter of the ejector 3.2 – 3.5 Thread · ISO 261/262
Pitch P 0.8
d2 4.48
d3 4.019
Tap drill 4.2
Stress area As 14.18 mm² Standard lengths
5 · 6 · 8 · 10 · 12 · 16 · 20 · 25
Size sheet · DIN 913
M6
s width across flats 3
e width across corners ≥ 3.44
t groove depth ≥ 2
df ≈ Lowerlimitofminorthreaddiameter
dp diameter of the ejector 3.7 – 4 Thread · ISO 261/262
Pitch P 1
d2 5.35
d3 4.773
Tap drill 5
Stress area As 20.12 mm² Standard lengths
6 · 8 · 10 · 12 · 16 · 20 · 25 · 30 · 35
Size sheet · DIN 913
M8
s width across flats 4
e width across corners ≥ 4.58
t groove depth ≥ 3
df ≈ Lowerlimitofminorthreaddiameter
dp diameter of the ejector 5.2 – 5.5 Thread · ISO 261/262
Pitch P 1.25
d2 7.188
d3 6.466
Tap drill 6.75
Stress area As 36.61 mm² Standard lengths
8 · 10 · 12 · 16 · 20 · 25 · 30 · 35 · 40
Size sheet · DIN 913
M10
s width across flats 5
e width across corners ≥ 5.72
t groove depth ≥ 4
df ≈ Lowerlimitofminorthreaddiameter
dp diameter of the ejector 6.64 – 7 Thread · ISO 261/262
Pitch P 1.5
d2 9.026
d3 8.16
Tap drill 8.5
Stress area As 57.99 mm² Standard lengths
10 · 12 · 16 · 20 · 25 · 30 · 35 · 40
Size sheet · DIN 913
M12
s width across flats 6
e width across corners ≥ 6.86
t groove depth ≥ 4.8
df ≈ Lowerlimitofminorthreaddiameter
dp diameter of the ejector 8.14 – 8.5 Thread · ISO 261/262
Pitch P 1.75
d2 10.863
d3 9.853
Tap drill 10.25
Stress area As 84.27 mm² Standard lengths
16 · 20 · 25 · 30 · 35 · 40
Size sheet · DIN 913
M14
s width across flats 6
e width across corners ≥ 6.86
t groove depth ≥ 5.6
df ≈ Lowerlimitofminorthreaddiameter
dp diameter of the ejector 9.64 – 10 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 913
M16
s width across flats 8
e width across corners ≥ 9.15
t groove depth ≥ 6.4
df ≈ Lowerlimitofminorthreaddiameter
dp diameter of the ejector 11.57 – 12 Thread · ISO 261/262
Pitch P 2
d2 14.701
d3 13.546
Tap drill 14
Stress area As 156.67 mm² Standard lengths
20 · 25 · 30 · 35 · 40
Size sheet · DIN 913
M18
s width across flats 10
e width across corners ≥ 11.43
t groove depth ≥ 7.2
df ≈ Lowerlimitofminorthreaddiameter
dp diameter of the ejector 12.57 – 13 Thread · ISO 261/262
Pitch P 2.5
d2 16.376
d3 14.933
Tap drill 15.5
Stress area As 192.47 mm² Size sheet · DIN 913
M20
s width across flats 10
e width across corners ≥ 11.43
t groove depth ≥ 8
df ≈ Lowerlimitofminorthreaddiameter
dp diameter of the ejector 14.57 – 15 Thread · ISO 261/262
Pitch P 2.5
d2 18.376
d3 16.933
Tap drill 17.5
Stress area As 244.79 mm² Standard lengths
20 · 25 · 30 · 35 · 40 · 45 · 50
Size sheet · DIN 913
M22
s width across flats 12
e width across corners ≥ 13.72
t groove depth ≥ 9
df ≈ Lowerlimitofminorthreaddiameter
dp diameter of the ejector 16.57 – 17 Thread · ISO 261/262
Pitch P 2.5
d2 20.376
d3 18.933
Tap drill 19.5
Stress area As 303.4 mm² Size sheet · DIN 913
M24
s width across flats 12
e width across corners ≥ 13.72
t groove depth ≥ 10
df ≈ Lowerlimitofminorthreaddiameter
dp diameter of the ejector 17.57 – 18 Thread · ISO 261/262
Pitch P 3
d2 22.051
d3 20.319
Tap drill 21
Stress area As 352.5 mm² Standard lengths
25 · 30 · 35 · 40 · 45 · 50 · 55 · 60
Provenance
Draft — values taken from a single source and not yet cross-checked.
Accessed 2026-09-23 · For design and safety-critical use, consult the current edition of the standard.
Data notes (2) The source publishes one identical table for DIN 913, ISO 4026. It does not match the official ISO 4026 preview, so it is kept as the DIN table. Source table repeats a row label (t min); the second row was not imported.