Dimensions mm · values as the standard states them Size P dk k b t f M24 3 38
25
54
12.1
6.6
M30 3.5 48
30
66
15.6
6.6
M33 3.5 52
30
72
16.4
7.6
M36 4 58
35
78
18.2
8.6
M39 4 62
40
84
19.9
8.6
M42 4.5 68
40
90
22.6
8.6
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 792
M24
dk head diameter 38
k head height 25
b thread length 54
t length of the nose 12.1
f width of the nib 6.6 Thread · ISO 261/262
Pitch P 3
d2 22.051
d3 20.319
Tap drill 21
Stress area As 352.5 mm² Size sheet · DIN 792
M30
dk head diameter 48
k head height 30
b thread length 66
t length of the nose 15.6
f width of the nib 6.6 Thread · ISO 261/262
Pitch P 3.5
d2 27.727
d3 25.706
Tap drill 26.5
Stress area As 560.59 mm² Size sheet · DIN 792
M33
dk head diameter 52
k head height 30
b thread length 72
t length of the nose 16.4
f width of the nib 7.6 Thread · ISO 261/262
Pitch P 3.5
d2 30.727
d3 28.706
Tap drill 29.5
Stress area As 693.55 mm² Size sheet · DIN 792
M36
dk head diameter 58
k head height 35
b thread length 78
t length of the nose 18.2
f width of the nib 8.6 Thread · ISO 261/262
Pitch P 4
d2 33.402
d3 31.093
Tap drill 32
Stress area As 816.72 mm² Size sheet · DIN 792
M39
dk head diameter 62
k head height 40
b thread length 84
t length of the nose 19.9
f width of the nib 8.6 Thread · ISO 261/262
Pitch P 4
d2 36.402
d3 34.093
Tap drill 35
Stress area As 975.75 mm² Size sheet · DIN 792
M42
dk head diameter 68
k head height 40
b thread length 90
t length of the nose 22.6
f width of the nib 8.6 Thread · ISO 261/262
Pitch P 4.5
d2 39.077
d3 36.479
Tap drill 37.5
Stress area As 1120.91 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.