Dimensions mm · values as the standard states them Size P dk k da r t n case_depth core_hole dh fit H11 w M2.5 0.45 4.5
4.32 – 4.5
1.6
1.46 – 1.6
≤ 3.1
≥ 0.1
≥ 0.7
0.6
0.66 – 0.8
0.04 – 0.12
M3,5
2.2
≥ 0.56
M3 0.5 5.5
5.32 – 5.5
2
1.86 – 2
≤ 3.6
≥ 0.1
≥ 0.85
0.8
0.86 – 1
0.05 – 0.18
M3
2.7
≥ 0.76
M4 0.7 7
6.78 – 7
2.6
2.46 – 2.6
≤ 4.7
≥ 0.2
≥ 1.1
1.2
1.26 – 1.51
0.1 – 0.25
M4
3.6
≥ 1.06
M5 0.8 8.5
8.26 – 8.5
3.3
3.12 – 3.3
≤ 5.7
≥ 0.2
≥ 1.3
1.2
1.26 – 1.51
0.1 – 0.25
M5
4.5
≥ 1.52
M6 1 10
9.78 – 10
3.9
3.6 – 3.9
≤ 6.8
≥ 0.25
≥ 1.6
1.6
1.66 – 1.91
0.15 – 0.28
M6
5.5
≥ 1.6
M8 1.25 13
12.73 – 13
5
4.7 – 5
≤ 9.2
≥ 0.4
≥ 2
2
2.06 – 2.31
0.15 – 0.28
M8
7.4
≥ 2.2
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 7513 B
M2.5
dk head diameter 4.5
k head height 1.6
da transition diameter ≤ 3.1
r fillet radius ≥ 0.1
t groove depth ≥ 0.7
n groove width 0.6
case_depth 0.04 – 0.12
core_hole M3,5
dh (fit H11) 2.2
w ≥ 0.56 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
6 · 8 · 10 · 12 · 14 · 16 · 18 · 20
Size sheet · DIN 7513 B
M3
dk head diameter 5.5
k head height 2
da transition diameter ≤ 3.6
r fillet radius ≥ 0.1
t groove depth ≥ 0.85
n groove width 0.8
case_depth 0.05 – 0.18
core_hole M3
dh (fit H11) 2.7
w ≥ 0.76 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
6 · 8 · 10 · 12 · 14 · 16 · 18 · 20 · 22
Size sheet · DIN 7513 B
M4
dk head diameter 7
k head height 2.6
da transition diameter ≤ 4.7
r fillet radius ≥ 0.2
t groove depth ≥ 1.1
n groove width 1.2
case_depth 0.1 – 0.25
core_hole M4
dh (fit H11) 3.6
w ≥ 1.06 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
8 · 10 · 12 · 14 · 16 · 18 · 20 · 22 · 25
Size sheet · DIN 7513 B
M5
dk head diameter 8.5
k head height 3.3
da transition diameter ≤ 5.7
r fillet radius ≥ 0.2
t groove depth ≥ 1.3
n groove width 1.2
case_depth 0.1 – 0.25
core_hole M5
dh (fit H11) 4.5
w ≥ 1.52 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
10 · 12 · 14 · 16 · 18 · 20 · 22 · 25 · 30
Size sheet · DIN 7513 B
M6
dk head diameter 10
k head height 3.9
da transition diameter ≤ 6.8
r fillet radius ≥ 0.25
t groove depth ≥ 1.6
n groove width 1.6
case_depth 0.15 – 0.28
core_hole M6
dh (fit H11) 5.5
w ≥ 1.6 Thread · ISO 261/262
Pitch P 1
d2 5.35
d3 4.773
Tap drill 5
Stress area As 20.12 mm² Standard lengths
12 · 14 · 16 · 18 · 20 · 22 · 25 · 30 · 35
Size sheet · DIN 7513 B
M8
dk head diameter 13
k head height 5
da transition diameter ≤ 9.2
r fillet radius ≥ 0.4
t groove depth ≥ 2
n groove width 2
case_depth 0.15 – 0.28
core_hole M8
dh (fit H11) 7.4
w ≥ 2.2 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
14 · 16 · 18 · 20 · 22 · 25 · 30 · 35 · 40
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.