Dimensions mm · values as the standard states them Size P dk b t n f M1 0.25 1.6
1.575 – 1.6
1.8
1.8 – 2.05
0.4 – 0.52
0.2
0.26 – 0.4
≤ 0.2
M1.2 0.25 1.8
1.775 – 1.8
1.8
1.8 – 2.05
0.4 – 0.52
0.25
0.31 – 0.45
≤ 0.2
M1.4 0.3 2
1.975 – 2
2.2
2.2 – 2.45
0.48 – 0.63
0.25
0.31 – 0.45
≤ 0.25
M1.6 0.35 2.2
2.175 – 2.2
2.5
2.5 – 2.75
0.56 – 0.74
0.3
0.36 – 0.5
≤ 0.3
M2 0.4 2.8
2.775 – 2.8
2.8
2.8 – 3.05
0.64 – 0.84
0.3
0.36 – 0.5
≤ 0.4
M2.5 0.45 3.5
3.47 – 3.5
3.5
3.5 – 3.8
0.72 – 0.95
0.4
0.46 – 0.6
≤ 0.5
M3 0.5 4
3.97 – 4
4.5
4.5 – 4.8
0.8 – 1.05
0.5
0.56 – 0.7
≤ 0.5
(M3.5) 0.6 4.5
4.47 – 4.5
5.5
5.5 – 5.8
0.96 – 1.21
0.5
0.56 – 0.7
≤ 0.7
M4 0.7 5.5
5.47 – 5.5
6
6 – 6.3
1.12 – 1.42
0.6
0.66 – 0.8
≤ 0.8
M5 0.8 6.5
6.464 – 6.5
7
7 – 7.36
1.28 – 1.63
0.8
0.86 – 1
≤ 0.8
M6 1 8
7.964 – 8
8
8 – 8.36
1.6 – 2
1
1.06 – 1.2
≤ 1
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 927
M1
dk head diameter 1.6
b thread length 1.8
t groove depth 0.4 – 0.52
n groove width 0.2
f ≤ 0.2 Thread · ISO 261/262
Pitch P 0.25
d2 0.838
d3 0.693
Tap drill 0.75
Stress area As 0.46 mm² Standard lengths
0.8 · 1 · 1.2 · 1.6 · 2
Size sheet · DIN 927
M1.2
dk head diameter 1.8
b thread length 1.8
t groove depth 0.4 – 0.52
n groove width 0.25
f ≤ 0.2 Thread · ISO 261/262
Pitch P 0.25
d2 1.038
d3 0.893
Tap drill 0.95
Stress area As 0.73 mm² Standard lengths
1 · 1.2 · 1.6 · 2 · 2.5
Size sheet · DIN 927
M1.4
dk head diameter 2
b thread length 2.2
t groove depth 0.48 – 0.63
n groove width 0.25
f ≤ 0.25 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
1 · 1.2 · 1.6 · 2 · 2.5
Size sheet · DIN 927
M1.6
dk head diameter 2.2
b thread length 2.5
t groove depth 0.56 – 0.74
n groove width 0.3
f ≤ 0.3 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
1.2 · 1.6 · 2 · 2.5 · 3
Size sheet · DIN 927
M2
dk head diameter 2.8
b thread length 2.8
t groove depth 0.64 – 0.84
n groove width 0.3
f ≤ 0.4 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
1.6 · 2 · 2.5 · 3 · 4
Size sheet · DIN 927
M2.5
dk head diameter 3.5
b thread length 3.5
t groove depth 0.72 – 0.95
n groove width 0.4
f ≤ 0.5 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
2 · 2.5 · 3 · 4 · 5
Size sheet · DIN 927
M3
dk head diameter 4
b thread length 4.5
t groove depth 0.8 – 1.05
n groove width 0.5
f ≤ 0.5 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
2.5 · 3 · 4 · 5 · 6
Size sheet · DIN 927
M3.5
dk head diameter 4.5
b thread length 5.5
t groove depth 0.96 – 1.21
n groove width 0.5
f ≤ 0.7 Thread · ISO 261/262
Pitch P 0.6
d2 3.11
d3 2.764
Tap drill 2.9
Stress area As 6.78 mm² Standard lengths
2.5 · 3 · 4 · 5 · 6
Size sheet · DIN 927
M4
dk head diameter 5.5
b thread length 6
t groove depth 1.12 – 1.42
n groove width 0.6
f ≤ 0.8 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
3 · 4 · 5 · 6 · 8
Size sheet · DIN 927
M5
dk head diameter 6.5
b thread length 7
t groove depth 1.28 – 1.63
n groove width 0.8
f ≤ 0.8 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
4 · 5 · 6 · 8 · 10
Size sheet · DIN 927
M6
dk head diameter 8
b thread length 8
t groove depth 1.6 – 2
n groove width 1
f ≤ 1 Thread · ISO 261/262
Pitch P 1
d2 5.35
d3 4.773
Tap drill 5
Stress area As 20.12 mm² Standard lengths
5 · 6 · 8 · 10
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.