Dimensions mm · values as the standard states them Size P m k d2 recess_no recess H M3 0.5 2.9
≤ 1.65
5.6
1
M4 0.7 4.4
≤ 2.2
7.5
2
M5 0.8 4.6
≤ 2.5
9.2
2
M6 1 6.6
≤ 3
11
3
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 7516 D
M3
m groove width 2.9
k head height ≤ 1.65
d2 5.6
recess_no drive size (recess H) 1 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 7516 D
M4
m groove width 4.4
k head height ≤ 2.2
d2 7.5
recess_no drive size (recess H) 2 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 7516 D
M5
m groove width 4.6
k head height ≤ 2.5
d2 9.2
recess_no drive size (recess H) 2 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 7516 D
M6
m groove width 6.6
k head height ≤ 3
d2 11
recess_no drive size (recess H) 3 Thread · ISO 261/262
Pitch P 1
d2 5.35
d3 4.773
Tap drill 5
Stress area As 20.12 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.