Dimensions mm · values as the standard states them Size P d1 s h d2 M4 0.7 ≥ 4.1
0.8
≥ 1.2
≤ 7.6
M5 0.8 ≥ 5.1
1
≥ 1.5
≤ 9.2
M6 1 ≥ 6.1
1.3
≥ 2
≤ 11.8
M8 1.25 ≥ 8.2
1.6
≥ 2.45
≤ 14.9
M10 1.5 ≥ 10.2
1.8
≥ 2.85
≤ 18.1
M12 1.75 ≥ 12.2
2.1
≥ 3.35
≤ 21.1
M16 2 ≥ 16.2
2.8
≥ 4.5
≤ 27.4
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 128 B
M4
d1 inside diameter ≥ 4.1
s 0.8
h thickness ≥ 1.2
d2 outside diameter ≤ 7.6 Thread · ISO 261/262
Pitch P 0.7
d2 3.545
d3 3.141
Tap drill 3.3
Stress area As 8.78 mm² Size sheet · DIN 128 B
M5
d1 inside diameter ≥ 5.1
s 1
h thickness ≥ 1.5
d2 outside diameter ≤ 9.2 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 128 B
M6
d1 inside diameter ≥ 6.1
s 1.3
h thickness ≥ 2
d2 outside diameter ≤ 11.8 Thread · ISO 261/262
Pitch P 1
d2 5.35
d3 4.773
Tap drill 5
Stress area As 20.12 mm² Size sheet · DIN 128 B
M8
d1 inside diameter ≥ 8.2
s 1.6
h thickness ≥ 2.45
d2 outside diameter ≤ 14.9 Thread · ISO 261/262
Pitch P 1.25
d2 7.188
d3 6.466
Tap drill 6.75
Stress area As 36.61 mm² Size sheet · DIN 128 B
M10
d1 inside diameter ≥ 10.2
s 1.8
h thickness ≥ 2.85
d2 outside diameter ≤ 18.1 Thread · ISO 261/262
Pitch P 1.5
d2 9.026
d3 8.16
Tap drill 8.5
Stress area As 57.99 mm² Size sheet · DIN 128 B
M12
d1 inside diameter ≥ 12.2
s 2.1
h thickness ≥ 3.35
d2 outside diameter ≤ 21.1 Thread · ISO 261/262
Pitch P 1.75
d2 10.863
d3 9.853
Tap drill 10.25
Stress area As 84.27 mm² Size sheet · DIN 128 B
M16
d1 inside diameter ≥ 16.2
s 2.8
h thickness ≥ 4.5
d2 outside diameter ≤ 27.4 Thread · ISO 261/262
Pitch P 2
d2 14.701
d3 13.546
Tap drill 14
Stress area As 156.67 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.