Dimensions mm · values as the standard states them Size P ds s e k b above stepped line in length table b below stepped line in length table dw da c r k´ M12 1.75 12
11.3 – 12.7
21.16 – 22
≥ 23.91
8
7.55 – 8.45
21
23
≥ 20
≤ 15.2
0.4 – 0.6
≥ 1.2
≥ 5.28
M16 2 16
15.3 – 16.7
26.16 – 27
≥ 29.56
10
9.25 – 10.75
26
28
≥ 25
≤ 19.2
0.4 – 0.6
≥ 1.2
≥ 6.47
M20 2.5 20
19.16 – 20.84
31 – 32
≥ 35.03
13
12.1 – 13.9
31
33
≥ 30
≤ 24
0.4 – 0.8
≥ 1.5
≥ 8.47
M22 2.5 22
21.16 – 22.84
35 – 36
≥ 39.55
14
13.1 – 14.9
32
34
≥ 34
≤ 26
0.4 – 0.8
≥ 1.5
≥ 9.17
M24 3 24
23.16 – 24.84
40 – 41
≥ 45.2
15
14.1 – 15.9
34
37
≥ 39
≤ 28
0.4 – 0.8
≥ 1.5
≥ 9.87
M27 3 27
26.16 – 27.84
45 – 46
≥ 50.85
17
16.1 – 17.9
37
39
≥ 43.5
≤ 32
0.4 – 0.8
≥ 2
≥ 11.27
M30 3.5 30
29.16 – 30.84
49 – 50
≥ 55.37
19
17.95 – 20.05
40
42
≥ 47.5
≤ 35
0.4 – 0.8
≥ 2
≥ 12.56
M36 4 36
35 – 37
58.8 – 60
≥ 66.44
23
21.95 – 24.05
48
50
≥ 57
≤ 41
0.4 – 0.8
≥ 2
≥ 15.36
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.
Length tolerances 30 28.95 – 31.05
35 33.75 – 36.25
40 38.75 – 41.25
45 43.75 – 46.25
50 48.75 – 51.25
55 53.5 – 56.5
60 58.5 – 61.5
65 63.5 – 66.5
70 68.5 – 71.5
75 73.5 – 76.5
80 78.5 – 81.5
85 83.25 – 86.75
90 88.25 – 91.75
95 93.25 – 96.75
100 98.25 – 101.75
105 103.25 – 106.75
110 108.25 – 111.75
115 113.25 – 116.75
120 118.25 – 121.75
125 123 – 127
130 128 – 132
135 133 – 137
140 138 – 142
145 143 – 147
150 148 – 152
155 151 – 159
160 156 – 164
165 161 – 169
170 166 – 174
175 171 – 179
180 176 – 184
185 180.4 – 189.6
190 185.4 – 194.6
195 190.4 – 199.6
200 195.4 – 204.6
Size sheet · DIN 6914
M12
ds shank diameter 12
s width across flats 21.16 – 22
e width across corners ≥ 23.91
k head height 8
b thread length (above stepped line in length table) 21
b thread length (below stepped line in length table) 23
dw bearing face diameter ≥ 20
da transition diameter ≤ 15.2
c thickness of the mounting collar 0.4 – 0.6
r fillet radius ≥ 1.2
k´ minimum size of the head on the key ≥ 5.28 Thread · ISO 261/262
Pitch P 1.75
d2 10.863
d3 9.853
Tap drill 10.25
Stress area As 84.27 mm² Standard lengths
30 · 35 · 40 · 45 · 50 · 55 · 60 · 65 · 70 · 75 · 80 · 85 · 90 · 95
Size sheet · DIN 6914
M16
ds shank diameter 16
s width across flats 26.16 – 27
e width across corners ≥ 29.56
k head height 10
b thread length (above stepped line in length table) 26
b thread length (below stepped line in length table) 28
dw bearing face diameter ≥ 25
da transition diameter ≤ 19.2
c thickness of the mounting collar 0.4 – 0.6
r fillet radius ≥ 1.2
k´ minimum size of the head on the key ≥ 6.47 Thread · ISO 261/262
Pitch P 2
d2 14.701
d3 13.546
Tap drill 14
Stress area As 156.67 mm² Standard lengths
40 · 45 · 50 · 55 · 60 · 65 · 70 · 75 · 80 · 85 · 90 · 95 · 100 · 105 · 110 · 115 · 120 · 125 · 130
Size sheet · DIN 6914
M20
ds shank diameter 20
s width across flats 31 – 32
e width across corners ≥ 35.03
k head height 13
b thread length (above stepped line in length table) 31
b thread length (below stepped line in length table) 33
dw bearing face diameter ≥ 30
da transition diameter ≤ 24
c thickness of the mounting collar 0.4 – 0.8
r fillet radius ≥ 1.5
k´ minimum size of the head on the key ≥ 8.47 Thread · ISO 261/262
Pitch P 2.5
d2 18.376
d3 16.933
Tap drill 17.5
Stress area As 244.79 mm² Standard lengths
45 · 50 · 55 · 60 · 65 · 70 · 75 · 80 · 85 · 90 · 95 · 100 · 105 · 110 · 115 · 120 · 125 · 130 · 135 · 140 · 145 · 150 · 155
Size sheet · DIN 6914
M22
ds shank diameter 22
s width across flats 35 – 36
e width across corners ≥ 39.55
k head height 14
b thread length (above stepped line in length table) 32
b thread length (below stepped line in length table) 34
dw bearing face diameter ≥ 34
da transition diameter ≤ 26
c thickness of the mounting collar 0.4 – 0.8
r fillet radius ≥ 1.5
k´ minimum size of the head on the key ≥ 9.17 Thread · ISO 261/262
Pitch P 2.5
d2 20.376
d3 18.933
Tap drill 19.5
Stress area As 303.4 mm² Standard lengths
50 · 55 · 60 · 65 · 70 · 75 · 80 · 85 · 90 · 95 · 100 · 105 · 110 · 115 · 120 · 125 · 130 · 135 · 140 · 145 · 150 · 155 · 160 · 165
Size sheet · DIN 6914
M24
ds shank diameter 24
s width across flats 40 – 41
e width across corners ≥ 45.2
k head height 15
b thread length (above stepped line in length table) 34
b thread length (below stepped line in length table) 37
dw bearing face diameter ≥ 39
da transition diameter ≤ 28
c thickness of the mounting collar 0.4 – 0.8
r fillet radius ≥ 1.5
k´ minimum size of the head on the key ≥ 9.87 Thread · ISO 261/262
Pitch P 3
d2 22.051
d3 20.319
Tap drill 21
Stress area As 352.5 mm² Standard lengths
60 · 65 · 70 · 75 · 80 · 85 · 90 · 95 · 100 · 105 · 110 · 115 · 120 · 125 · 130 · 135 · 140 · 145 · 150 · 155 · 160 · 165 · 170 · 175 · 180 · 185 · 190 · 195
Size sheet · DIN 6914
M27
ds shank diameter 27
s width across flats 45 – 46
e width across corners ≥ 50.85
k head height 17
b thread length (above stepped line in length table) 37
b thread length (below stepped line in length table) 39
dw bearing face diameter ≥ 43.5
da transition diameter ≤ 32
c thickness of the mounting collar 0.4 – 0.8
r fillet radius ≥ 2
k´ minimum size of the head on the key ≥ 11.27 Thread · ISO 261/262
Pitch P 3
d2 25.051
d3 23.319
Tap drill 24
Stress area As 459.41 mm² Standard lengths
70 · 75 · 80 · 85 · 90 · 95 · 100 · 105 · 110 · 115 · 120 · 125 · 130 · 135 · 140 · 145 · 150 · 155 · 160 · 165 · 170 · 175 · 180 · 185 · 190 · 195 · 200
Size sheet · DIN 6914
M30
ds shank diameter 30
s width across flats 49 – 50
e width across corners ≥ 55.37
k head height 19
b thread length (above stepped line in length table) 40
b thread length (below stepped line in length table) 42
dw bearing face diameter ≥ 47.5
da transition diameter ≤ 35
c thickness of the mounting collar 0.4 – 0.8
r fillet radius ≥ 2
k´ minimum size of the head on the key ≥ 12.56 Thread · ISO 261/262
Pitch P 3.5
d2 27.727
d3 25.706
Tap drill 26.5
Stress area As 560.59 mm² Standard lengths
75 · 80 · 85 · 90 · 95 · 100 · 105 · 110 · 115 · 120 · 125 · 130 · 135 · 140 · 145 · 150 · 155 · 160 · 165 · 170 · 175 · 180 · 185 · 190 · 195 · 200
Size sheet · DIN 6914
M36
ds shank diameter 36
s width across flats 58.8 – 60
e width across corners ≥ 66.44
k head height 23
b thread length (above stepped line in length table) 48
b thread length (below stepped line in length table) 50
dw bearing face diameter ≥ 57
da transition diameter ≤ 41
c thickness of the mounting collar 0.4 – 0.8
r fillet radius ≥ 2
k´ minimum size of the head on the key ≥ 15.36 Thread · ISO 261/262
Pitch P 4
d2 33.402
d3 31.093
Tap drill 32
Stress area As 816.72 mm² Standard lengths
85 · 90 · 95 · 100 · 105 · 110 · 115 · 120 · 125 · 130 · 135 · 140 · 145 · 150 · 155 · 160 · 165 · 170 · 175 · 180 · 185 · 190 · 195 · 200
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 6914, ISO 7411. Kept as the DIN table (the source lists the DIN as the current norm); equivalence with the ISO standard is not verified.