Dimensions mm · values as the standard states them Size P dk k r t n case_depth core_hole dh fit H11 M2.5 0.45 4.7
4.4 – 4.7
≤ 1.5
≤ 0.25
0.5 – 0.7
0.6
0.66 – 0.8
0.04 – 0.12
M3
2.2
M3 0.5 5.6
5.3 – 5.6
≤ 1.65
≤ 0.3
0.6 – 0.85
0.8
0.86 – 1
0.05 – 0.18
M4
2.7
M4 0.7 7.5
7.14 – 7.5
≤ 2.2
≤ 0.4
0.8 – 1.1
1
1.06 – 1.2
0.1 – 0.25
M5
3.6
M5 0.8 9.2
8.84 – 9.2
≤ 2.5
≤ 0.5
1 – 1.3
1.2
1.26 – 1.51
0.1 – 0.25
M6
4.5
M6 1 11
10.57 – 11
≤ 3
≤ 0.6
1.2 – 1.6
1.6
1.66 – 1.91
0.15 – 0.28
M8
5.5
M8 1.25 14.5
14.07 – 14.5
≤ 4
≤ 0.8
1.6 – 2.1
2
2.06 – 2.31
0.15 – 0.28
M8
7.4
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 F
M2.5
dk head diameter 4.7
k head height ≤ 1.5
r fillet radius ≤ 0.25
t groove depth 0.5 – 0.7
n groove width 0.6
case_depth 0.04 – 0.12
core_hole M3
dh (fit H11) 2.2 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 F
M3
dk head diameter 5.6
k head height ≤ 1.65
r fillet radius ≤ 0.3
t groove depth 0.6 – 0.85
n groove width 0.8
case_depth 0.05 – 0.18
core_hole M4
dh (fit H11) 2.7 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 F
M4
dk head diameter 7.5
k head height ≤ 2.2
r fillet radius ≤ 0.4
t groove depth 0.8 – 1.1
n groove width 1
case_depth 0.1 – 0.25
core_hole M5
dh (fit H11) 3.6 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 F
M5
dk head diameter 9.2
k head height ≤ 2.5
r fillet radius ≤ 0.5
t groove depth 1 – 1.3
n groove width 1.2
case_depth 0.1 – 0.25
core_hole M6
dh (fit H11) 4.5 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
10 · 12 · 14 · 16 · 18 · 20 · 22 · 25 · 30
Size sheet · DIN 7513 F
M6
dk head diameter 11
k head height ≤ 3
r fillet radius ≤ 0.6
t groove depth 1.2 – 1.6
n groove width 1.6
case_depth 0.15 – 0.28
core_hole M8
dh (fit H11) 5.5 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 F
M8
dk head diameter 14.5
k head height ≤ 4
r fillet radius ≤ 0.8
t groove depth 1.6 – 2.1
n groove width 2
case_depth 0.15 – 0.28
core_hole M8
dh (fit H11) 7.4 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.