Head · drive Headless · Slot
Thread Metric ISO coarse thread, full length
Tolerance for size M1,4 - 6h, from size M1,6 - 6g
Property classes 5.8 A1
Materials Steel Stainless Brass
Dimensions mm · values as the standard states them Size P t n dp M1 0.25 0.4
0.2
0.5
M1.2 0.25 0.4
0.2
0.7
M1.4 0.3 0.48
0.2
0.8
M1.6 0.35 0.56
0.25
0.8
M2 0.4 0.64
0.25
1.2
M2.5 0.45 0.72
0.4
1.5
M3 0.5 0.8
0.5
2
M3.5 0.6 0.96
0.5
2.5
M4 0.7 1.12
0.6
2.8
M5 0.8 1.28
0.8
3.5
M6 1 1.6
1
4.5
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 926
M1
t groove depth 0.4
n groove width 0.2
dp the diameter of the stud (no more) 0.5 Thread · ISO 261/262
Pitch P 0.25
d2 0.838
d3 0.693
Tap drill 0.75
Stress area As 0.46 mm² Size sheet · DIN 926
M1.2
t groove depth 0.4
n groove width 0.2
dp the diameter of the stud (no more) 0.7 Thread · ISO 261/262
Pitch P 0.25
d2 1.038
d3 0.893
Tap drill 0.95
Stress area As 0.73 mm² Size sheet · DIN 926
M1.4
t groove depth 0.48
n groove width 0.2
dp the diameter of the stud (no more) 0.8 Thread · ISO 261/262
Pitch P 0.3
d2 1.205
d3 1.032
Tap drill 1.1
Stress area As 0.98 mm² Size sheet · DIN 926
M1.6
t groove depth 0.56
n groove width 0.25
dp the diameter of the stud (no more) 0.8 Thread · ISO 261/262
Pitch P 0.35
d2 1.373
d3 1.171
Tap drill 1.25
Stress area As 1.27 mm² Size sheet · DIN 926
M2
t groove depth 0.64
n groove width 0.25
dp the diameter of the stud (no more) 1.2 Thread · ISO 261/262
Pitch P 0.4
d2 1.74
d3 1.509
Tap drill 1.6
Stress area As 2.07 mm² Size sheet · DIN 926
M2.5
t groove depth 0.72
n groove width 0.4
dp the diameter of the stud (no more) 1.5 Thread · ISO 261/262
Pitch P 0.45
d2 2.208
d3 1.948
Tap drill 2.05
Stress area As 3.39 mm² Size sheet · DIN 926
M3
t groove depth 0.8
n groove width 0.5
dp the diameter of the stud (no more) 2 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 926
M3.5
t groove depth 0.96
n groove width 0.5
dp the diameter of the stud (no more) 2.5 Thread · ISO 261/262
Pitch P 0.6
d2 3.11
d3 2.764
Tap drill 2.9
Stress area As 6.78 mm² Size sheet · DIN 926
M4
t groove depth 1.12
n groove width 0.6
dp the diameter of the stud (no more) 2.8 Thread · ISO 261/262
Pitch P 0.7
d2 3.545
d3 3.141
Tap drill 3.3
Stress area As 8.78 mm² Size sheet · DIN 926
M5
t groove depth 1.28
n groove width 0.8
dp the diameter of the stud (no more) 3.5 Thread · ISO 261/262
Pitch P 0.8
d2 4.48
d3 4.019
Tap drill 4.2
Stress area As 14.18 mm² Size sheet · DIN 926
M6
t groove depth 1.6
n groove width 1
dp the diameter of the stud (no more) 4.5 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.
Data notes (1) Status (active/withdrawn) could not be confirmed from the sources used.