Dimensions mm · values as the standard states them Size P ds dk k b 125 < l ≤ 200 b l > 200 b l ≤ 125 f r1 r2 r3 v M5 0.8 4.52 – 5
12.45 – 13.55
2.7 – 3.3
22
—
16
2.9 – 4.1
≈ 10.7
≤ 0.5
≤ 0.75
4.52 – 5.48
M6 1 5.52 – 6
15.45 – 16.55
3.12 – 3.88
24
—
18
3.4 – 4.6
≈ 12.6
≤ 0.5
≤ 0.9
5.52 – 6.48
M8 1.25 7.42 – 8
19.35 – 20.65
4.12 – 4.88
28
41
22
4.4 – 5.6
≈ 16
≤ 0.5
≤ 1.2
7.42 – 8.58
M10 1.5 9.42 – 10
23.35 – 24.65
4.62 – 5.38
32
45
26
5.4 – 6.6
≈ 19.2
≤ 0.5
≤ 1.5
9.42 – 10.58
M12 1.75 11.3 – 12
29.35 – 30.65
6.05 – 6.95
36
49
30
7.25 – 8.75
≈ 24.1
≤ 1
≤ 1.8
11.3 – 12.7
M16 2 15.3 – 16
37.2 – 38.8
8.05 – 8.95
44
57
38
11.1 – 12.9
≈ 29.3
≤ 1
≤ 2.4
15.3 – 16.7
M20 2.5 19.16 – 20
45.2 – 46.8
9.95 – 11.05
52
65
46
14.1 – 15.9
≈ 33.9
≤ 1
≤ 3
19.16 – 20.84
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 16 15.1 – 16.9
20 18.95 – 21.05
25 23.95 – 26.05
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
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
180 176 – 184
200 195.4 – 204.6
Size sheet · DIN 603
M5
ds shank diameter 4.52 – 5
dk head diameter 12.45 – 13.55
k head height 2.7 – 3.3
b thread length (125 < l ≤ 200) 22
b thread length (l ≤ 125) 16
f height squared 2.9 – 4.1
r1 Head radius ≈ 10.7
r2 ≤ 0.5
r3 ≤ 0.75
v width of the square 4.52 – 5.48 Thread · ISO 261/262
Pitch P 0.8
d2 4.48
d3 4.019
Tap drill 4.2
Stress area As 14.18 mm² Standard lengths
16 · 20 · 25 · 30 · 35 · 40 · 45 · 50 · 55 · 60 · 65 · 70 · 80
Size sheet · DIN 603
M6
ds shank diameter 5.52 – 6
dk head diameter 15.45 – 16.55
k head height 3.12 – 3.88
b thread length (125 < l ≤ 200) 24
b thread length (l ≤ 125) 18
f height squared 3.4 – 4.6
r1 Head radius ≈ 12.6
r2 ≤ 0.5
r3 ≤ 0.9
v width of the square 5.52 – 6.48 Thread · ISO 261/262
Pitch P 1
d2 5.35
d3 4.773
Tap drill 5
Stress area As 20.12 mm² Standard lengths
16 · 20 · 25 · 30 · 35 · 40 · 45 · 50 · 55 · 60 · 65 · 70 · 80 · 90 · 100 · 110 · 120 · 130 · 140 · 150
Size sheet · DIN 603
M8
ds shank diameter 7.42 – 8
dk head diameter 19.35 – 20.65
k head height 4.12 – 4.88
b thread length (125 < l ≤ 200) 28
b thread length (l > 200) 41
b thread length (l ≤ 125) 22
f height squared 4.4 – 5.6
r1 Head radius ≈ 16
r2 ≤ 0.5
r3 ≤ 1.2
v width of the square 7.42 – 8.58 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
20 · 25 · 30 · 35 · 40 · 45 · 50 · 55 · 60 · 65 · 70 · 80 · 90 · 100 · 110 · 120 · 130 · 140 · 150
Size sheet · DIN 603
M10
ds shank diameter 9.42 – 10
dk head diameter 23.35 – 24.65
k head height 4.62 – 5.38
b thread length (125 < l ≤ 200) 32
b thread length (l > 200) 45
b thread length (l ≤ 125) 26
f height squared 5.4 – 6.6
r1 Head radius ≈ 19.2
r2 ≤ 0.5
r3 ≤ 1.5
v width of the square 9.42 – 10.58 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
20 · 25 · 30 · 35 · 40 · 45 · 50 · 55 · 60 · 65 · 70 · 80 · 90 · 100 · 110 · 120 · 130 · 140 · 150 · 160 · 180 · 200
Size sheet · DIN 603
M12
ds shank diameter 11.3 – 12
dk head diameter 29.35 – 30.65
k head height 6.05 – 6.95
b thread length (125 < l ≤ 200) 36
b thread length (l > 200) 49
b thread length (l ≤ 125) 30
f height squared 7.25 – 8.75
r1 Head radius ≈ 24.1
r2 ≤ 1
r3 ≤ 1.8
v width of the square 11.3 – 12.7 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 · 80 · 90 · 100 · 110 · 120 · 130 · 140 · 150 · 160 · 180 · 200
Size sheet · DIN 603
M16
ds shank diameter 15.3 – 16
dk head diameter 37.2 – 38.8
k head height 8.05 – 8.95
b thread length (125 < l ≤ 200) 44
b thread length (l > 200) 57
b thread length (l ≤ 125) 38
f height squared 11.1 – 12.9
r1 Head radius ≈ 29.3
r2 ≤ 1
r3 ≤ 2.4
v width of the square 15.3 – 16.7 Thread · ISO 261/262
Pitch P 2
d2 14.701
d3 13.546
Tap drill 14
Stress area As 156.67 mm² Standard lengths
55 · 60 · 65 · 70 · 80 · 90 · 100 · 110 · 120 · 130 · 140 · 150 · 160 · 180 · 200
Size sheet · DIN 603
M20
ds shank diameter 19.16 – 20
dk head diameter 45.2 – 46.8
k head height 9.95 – 11.05
b thread length (125 < l ≤ 200) 52
b thread length (l > 200) 65
b thread length (l ≤ 125) 46
f height squared 14.1 – 15.9
r1 Head radius ≈ 33.9
r2 ≤ 1
r3 ≤ 3
v width of the square 19.16 – 20.84 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
70 · 80 · 90 · 100 · 110 · 120 · 130 · 140 · 150 · 160 · 180 · 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 (2) Sources disagree on the status: fasteners.eu lists it as current, the Otto Roth DIN→EN/ISO handbook lists it as withdrawn. The source publishes one identical table for DIN 603, ISO 8677. Kept as the DIN table (the source lists the DIN as the current norm); equivalence with the ISO standard is not verified.