Dimensions mm · values as the standard states them Size P d1 s b l1 l2 M4 0.7 4.3
0.38
5
14
6.5
M5 0.8 5.3
0.5
6
16
8
M6 1 6.4
0.5
7
18
9
M8 1.25 8.4
0.75
8
20
11
M10 1.5 10.5
0.75
10
22
13
M12 1.75 13
1
12
28
15
M14 2 15
1
12
28
16
M16 2 17
1
15
32
18
M18 2.5 19
1
18
36
20
M20 2.5 21
1
18
36
21
M22 2.5 23
1
20
42
23
M24 3 25
1
20
42
25
M27 3 28
1.6
23
48
29
M30 3.5 31
1.6
26
52
32
M33 3.5 34
1.6
28
56
34
M36 4 37
1.6
30
60
38
M39 4 40
1.6
32
64
41
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 463
M4
d1 inside diameter 4.3
s 0.38
b tab width 5
l1 distance 14
l2 distance 6.5 Thread · ISO 261/262
Pitch P 0.7
d2 3.545
d3 3.141
Tap drill 3.3
Stress area As 8.78 mm² Size sheet · DIN 463
M5
d1 inside diameter 5.3
s 0.5
b tab width 6
l1 distance 16
l2 distance 8 Thread · ISO 261/262
Pitch P 0.8
d2 4.48
d3 4.019
Tap drill 4.2
Stress area As 14.18 mm² Size sheet · DIN 463
M6
d1 inside diameter 6.4
s 0.5
b tab width 7
l1 distance 18
l2 distance 9 Thread · ISO 261/262
Pitch P 1
d2 5.35
d3 4.773
Tap drill 5
Stress area As 20.12 mm² Size sheet · DIN 463
M8
d1 inside diameter 8.4
s 0.75
b tab width 8
l1 distance 20
l2 distance 11 Thread · ISO 261/262
Pitch P 1.25
d2 7.188
d3 6.466
Tap drill 6.75
Stress area As 36.61 mm² Size sheet · DIN 463
M10
d1 inside diameter 10.5
s 0.75
b tab width 10
l1 distance 22
l2 distance 13 Thread · ISO 261/262
Pitch P 1.5
d2 9.026
d3 8.16
Tap drill 8.5
Stress area As 57.99 mm² Size sheet · DIN 463
M12
d1 inside diameter 13
s 1
b tab width 12
l1 distance 28
l2 distance 15 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 463
M14
d1 inside diameter 15
s 1
b tab width 12
l1 distance 28
l2 distance 16 Thread · ISO 261/262
Pitch P 2
d2 12.701
d3 11.546
Tap drill 12
Stress area As 115.44 mm² Size sheet · DIN 463
M16
d1 inside diameter 17
s 1
b tab width 15
l1 distance 32
l2 distance 18 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 463
M18
d1 inside diameter 19
s 1
b tab width 18
l1 distance 36
l2 distance 20 Thread · ISO 261/262
Pitch P 2.5
d2 16.376
d3 14.933
Tap drill 15.5
Stress area As 192.47 mm² Size sheet · DIN 463
M20
d1 inside diameter 21
s 1
b tab width 18
l1 distance 36
l2 distance 21 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 463
M22
d1 inside diameter 23
s 1
b tab width 20
l1 distance 42
l2 distance 23 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 463
M24
d1 inside diameter 25
s 1
b tab width 20
l1 distance 42
l2 distance 25 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 463
M27
d1 inside diameter 28
s 1.6
b tab width 23
l1 distance 48
l2 distance 29 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 463
M30
d1 inside diameter 31
s 1.6
b tab width 26
l1 distance 52
l2 distance 32 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 463
M33
d1 inside diameter 34
s 1.6
b tab width 28
l1 distance 56
l2 distance 34 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 463
M36
d1 inside diameter 37
s 1.6
b tab width 30
l1 distance 60
l2 distance 38 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 463
M39
d1 inside diameter 40
s 1.6
b tab width 32
l1 distance 64
l2 distance 41 Thread · ISO 261/262
Pitch P 4
d2 36.402
d3 34.093
Tap drill 35
Stress area As 975.75 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.
Data notes (1) Status (active/withdrawn) could not be confirmed from the sources used.