Dimensions mm · values as the standard states them Size P s e m dw mass m´ M12 1.75 22
21.16 – 22
≥ 23.91
10
9.64 – 10
≥ 20
23.3
≥ 7.71
M16 2 27
26.16 – 27
≥ 29.56
13
12.3 – 13
≥ 25
44.8
≥ 9.84
M20 2.5 32
31 – 32
≥ 35.03
16
14.9 – 16
≥ 30
73.9
≥ 11.92
M22 2.5 36
35 – 36
≥ 39.55
18
16.9 – 18
≥ 34
104
≥ 13.52
M24 3 41
40 – 41
≥ 45.2
19
17.7 – 19
≥ 39
155
≥ 14.16
M27 3 46
45 – 46
≥ 50.85
22
20.7 – 22
≥ 43.5
224
≥ 16.56
M30 3.5 50
49 – 50
≥ 55.37
24
22.7 – 24
≥ 47.5
300
≥ 18.16
M36 4 60
58.8 – 60
≥ 66.44
29
27.7 – 29
≥ 57
515
≥ 22.16
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 6915
M12
s width across flats 22
e width across corners ≥ 23.91
m nut height 10
dw bearing face diameter ≥ 20
mass mass per 1000 pieces (kg) 23.3
m´ ≥ 7.71 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 6915
M16
s width across flats 27
e width across corners ≥ 29.56
m nut height 13
dw bearing face diameter ≥ 25
mass mass per 1000 pieces (kg) 44.8
m´ ≥ 9.84 Thread · ISO 261/262
Pitch P 2
d2 14.701
d3 13.546
Tap drill 14
Stress area As 156.67 mm² Size sheet · DIN 6915
M20
s width across flats 32
e width across corners ≥ 35.03
m nut height 16
dw bearing face diameter ≥ 30
mass mass per 1000 pieces (kg) 73.9
m´ ≥ 11.92 Thread · ISO 261/262
Pitch P 2.5
d2 18.376
d3 16.933
Tap drill 17.5
Stress area As 244.79 mm² Size sheet · DIN 6915
M22
s width across flats 36
e width across corners ≥ 39.55
m nut height 18
dw bearing face diameter ≥ 34
mass mass per 1000 pieces (kg) 104
m´ ≥ 13.52 Thread · ISO 261/262
Pitch P 2.5
d2 20.376
d3 18.933
Tap drill 19.5
Stress area As 303.4 mm² Size sheet · DIN 6915
M24
s width across flats 41
e width across corners ≥ 45.2
m nut height 19
dw bearing face diameter ≥ 39
mass mass per 1000 pieces (kg) 155
m´ ≥ 14.16 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 6915
M27
s width across flats 46
e width across corners ≥ 50.85
m nut height 22
dw bearing face diameter ≥ 43.5
mass mass per 1000 pieces (kg) 224
m´ ≥ 16.56 Thread · ISO 261/262
Pitch P 3
d2 25.051
d3 23.319
Tap drill 24
Stress area As 459.41 mm² Size sheet · DIN 6915
M30
s width across flats 50
e width across corners ≥ 55.37
m nut height 24
dw bearing face diameter ≥ 47.5
mass mass per 1000 pieces (kg) 300
m´ ≥ 18.16 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 6915
M36
s width across flats 60
e width across corners ≥ 66.44
m nut height 29
dw bearing face diameter ≥ 57
mass mass per 1000 pieces (kg) 515
m´ ≥ 22.16 Thread · ISO 261/262
Pitch P 4
d2 33.402
d3 31.093
Tap drill 32
Stress area As 816.72 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 Otto Roth status Accessed 2026-09-23 · For design and safety-critical use, consult the current edition of the standard.
Data notes (1) The source publishes one identical table for DIN 6915, ISO 4775. Kept as the DIN table (the source lists the DIN as the current norm); equivalence with the ISO standard is not verified.