Dimensions mm · values as the standard states them Size P ds e m k b b auxiliary n lg type B ls type B r1 r2 M6 1 6
5.52 – 6.48
≥ 6.88
16
15.1 – 16.9
4.5
4.1 – 4.9
18
—
6
5.4 – 6.6
≤ 10
≥ 5
≈ 0.5
≤ 0.9
M8 1.25 8
7.42 – 8.58
≥ 9.24
18
17.1 – 18.9
5.5
5.1 – 5.9
22
—
8
7.25 – 8.75
≤ 13
≥ 6.75
≈ 0.5
≤ 1.2
M10 1.5 10
9.42 – 10.58
≥ 11.81
21
20 – 22
7
6.5 – 7.5
26
—
10
9.25 – 10.75
≤ 16
≥ 8.5
≈ 0.5
≤ 1.5
M12 1.75 12
11.3 – 12.7
≥ 14.17
26
25 – 27
8
7.25 – 8.75
30
—
12
11.1 – 12.9
≤ 19
≥ 10.25
≈ 1
≤ 1.8
M16 2 16
15.3 – 16.7
≥ 19.32
30
29 – 31
10.5
9.6 – 11.4
38
44
16
15.1 – 16.9
≤ 25
≥ 15
≈ 1
≤ 2.4
M20 2.5 20
19.16 – 20.84
≥ 24.33
36
34.75 – 37.25
13
12.1 – 13.9
46
52
20
19 – 21
≤ 31
≥ 18.5
≈ 1
≤ 3
M24 3 24
≥ 29.48
43
41.75 – 44.25
15
14.1 – 15.9
54
60
24
23 – 25
≤ 37
≥ 22
≈ 1.6
≤ 3.6
M30 3.5 30
29.16 – 30.84
≥ 37.2
54
52.5 – 55.5
19
18 – 20
66
72
30
29 – 31
≤ 43
≥ 25.5
≈ 1.6
≤ 4.5
M36 4 36
35 – 37
≥ 44.57
66
64.5 – 67.5
23
22 – 24
78
84
36
34.75 – 37.25
≤ 55
≥ 35
≈ 2
≤ 5.4
M42 4.5 42
41 – 43
≥ 52.29
80
78.5 – 81.5
26
25 – 27
—
96
42
40.75 – 43.25
≤ 54
≥ 41.5
≈ 2
≤ 6.3
M48 5 48
47 – 49
≥ 60
88
86.25 – 89.75
30
29 – 31
—
108
48
46.75 – 49.25
≤ 72
≥ 47
≈ 2
≤ 7.2
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
90 88.25 – 91.75
100 98.25 – 101.75
110 108.25 – 111.75
120 118.25 – 121.75
130 128 – 132
140 138 – 142
150 148 – 152
160 156 – 164
170 166 – 174
180 176 – 184
190 185.4 – 194.6
200 195.4 – 204.6
Size sheet · DIN 186
M6
ds shank diameter 6
e width across corners ≥ 6.88
m head width 16
k head height 4.5
b thread length 18
n head thickness 6
lg length of the shank to thread (type B) ≤ 10
ls length of the shank to the start of the thread (type B) ≥ 5
r1 radius ≈ 0.5
r2 ≤ 0.9 Thread · ISO 261/262
Pitch P 1
d2 5.35
d3 4.773
Tap drill 5
Stress area As 20.12 mm² Standard lengths
45 · 50 · 55 · 60
Size sheet · DIN 186
M8
ds shank diameter 8
e width across corners ≥ 9.24
m head width 18
k head height 5.5
b thread length 22
n head thickness 8
lg length of the shank to thread (type B) ≤ 13
ls length of the shank to the start of the thread (type B) ≥ 6.75
r1 radius ≈ 0.5
r2 ≤ 1.2 Thread · ISO 261/262
Pitch P 1.25
d2 7.188
d3 6.466
Tap drill 6.75
Stress area As 36.61 mm² Standard lengths
45 · 50 · 55 · 60 · 65 · 70 · 75 · 80
Size sheet · DIN 186
M10
ds shank diameter 10
e width across corners ≥ 11.81
m head width 21
k head height 7
b thread length 26
n head thickness 10
lg length of the shank to thread (type B) ≤ 16
ls length of the shank to the start of the thread (type B) ≥ 8.5
r1 radius ≈ 0.5
r2 ≤ 1.5 Thread · ISO 261/262
Pitch P 1.5
d2 9.026
d3 8.16
Tap drill 8.5
Stress area As 57.99 mm² Standard lengths
50 · 55 · 60 · 65 · 70 · 75 · 80 · 90 · 100
Size sheet · DIN 186
M12
ds shank diameter 12
e width across corners ≥ 14.17
m head width 26
k head height 8
b thread length 30
n head thickness 12
lg length of the shank to thread (type B) ≤ 19
ls length of the shank to the start of the thread (type B) ≥ 10.25
r1 radius ≈ 1
r2 ≤ 1.8 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
55 · 60 · 65 · 70 · 75 · 80 · 90 · 100 · 110 · 120
Size sheet · DIN 186
M16
ds shank diameter 16
e width across corners ≥ 19.32
m head width 30
k head height 10.5
b thread length 38
b thread length (auxiliary) 44
n head thickness 16
lg length of the shank to thread (type B) ≤ 25
ls length of the shank to the start of the thread (type B) ≥ 15
r1 radius ≈ 1
r2 ≤ 2.4 Thread · ISO 261/262
Pitch P 2
d2 14.701
d3 13.546
Tap drill 14
Stress area As 156.67 mm² Standard lengths
70 · 75 · 80 · 90 · 100 · 110 · 120 · 130 · 140 · 150 · 160
Size sheet · DIN 186
M20
ds shank diameter 20
e width across corners ≥ 24.33
m head width 36
k head height 13
b thread length 46
b thread length (auxiliary) 52
n head thickness 20
lg length of the shank to thread (type B) ≤ 31
ls length of the shank to the start of the thread (type B) ≥ 18.5
r1 radius ≈ 1
r2 ≤ 3 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
80 · 90 · 100 · 110 · 120 · 130 · 140 · 150 · 160 · 170 · 180 · 190 · 200
Size sheet · DIN 186
M24
ds shank diameter 24
e width across corners ≥ 29.48
m head width 43
k head height 15
b thread length 54
b thread length (auxiliary) 60
n head thickness 24
lg length of the shank to thread (type B) ≤ 37
ls length of the shank to the start of the thread (type B) ≥ 22
r1 radius ≈ 1.6
r2 ≤ 3.6 Thread · ISO 261/262
Pitch P 3
d2 22.051
d3 20.319
Tap drill 21
Stress area As 352.5 mm² Standard lengths
110 · 120 · 130 · 140 · 150 · 160 · 170 · 180 · 190 · 200
Size sheet · DIN 186
M30
ds shank diameter 30
e width across corners ≥ 37.2
m head width 54
k head height 19
b thread length 66
b thread length (auxiliary) 72
n head thickness 30
lg length of the shank to thread (type B) ≤ 43
ls length of the shank to the start of the thread (type B) ≥ 25.5
r1 radius ≈ 1.6
r2 ≤ 4.5 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
120 · 130 · 140 · 150 · 160 · 170 · 180 · 190 · 200
Size sheet · DIN 186
M36
ds shank diameter 36
e width across corners ≥ 44.57
m head width 66
k head height 23
b thread length 78
b thread length (auxiliary) 84
n head thickness 36
lg length of the shank to thread (type B) ≤ 55
ls length of the shank to the start of the thread (type B) ≥ 35
r1 radius ≈ 2
r2 ≤ 5.4 Thread · ISO 261/262
Pitch P 4
d2 33.402
d3 31.093
Tap drill 32
Stress area As 816.72 mm² Standard lengths
150 · 160 · 170 · 180 · 190 · 200
Size sheet · DIN 186
M42
ds shank diameter 42
e width across corners ≥ 52.29
m head width 80
k head height 26
b thread length (auxiliary) 96
n head thickness 42
lg length of the shank to thread (type B) ≤ 54
ls length of the shank to the start of the thread (type B) ≥ 41.5
r1 radius ≈ 2
r2 ≤ 6.3 Thread · ISO 261/262
Pitch P 4.5
d2 39.077
d3 36.479
Tap drill 37.5
Stress area As 1120.91 mm² Standard lengths
160 · 170 · 180 · 190 · 200
Size sheet · DIN 186
M48
ds shank diameter 48
e width across corners ≥ 60
m head width 88
k head height 30
b thread length (auxiliary) 108
n head thickness 48
lg length of the shank to thread (type B) ≤ 72
ls length of the shank to the start of the thread (type B) ≥ 47
r1 radius ≈ 2
r2 ≤ 7.2 Thread · ISO 261/262
Pitch P 5
d2 44.752
d3 41.866
Tap drill 43
Stress area As 1473.15 mm² Standard lengths
190 · 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 Accessed 2026-09-23 · For design and safety-critical use, consult the current edition of the standard.
Data notes (1) 1 value(s) omitted after consistency checks: M24 ds: min 23.16 > max 2.84 in source — min/max omitted