Dimensions mm · values as the standard states them Size P d1 dk k c r 1.4 1.35 – 1.4
2.2 – 2.6
0.7 – 0.9
0.42
1.4
1.6 1.55 – 1.6
2.6 – 3
0.9 – 1.1
0.48
1.6
2 1.95 – 2
3.3 – 3.7
1.1 – 1.3
0.6
1.9
2.5 2.425 – 2.5
4.2 – 4.6
1.4 – 1.6
0.75
2.4
3 2.925 – 3
4.95 – 5.45
1.65 – 1.95
0.9
2.8
4 3.9 – 4
6.75 – 7.25
2.25 – 2.55
1.2
3.8
5 4.9 – 5
8.5 – 9.1
2.85 – 3.15
1.5
4.6
6 5.9 – 6
10.2 – 10.8
3.45 – 3.75
1.8
5.7
8 7.85 – 8
13.6 – 14.4
4.6 – 5
2.4
7.5
10 9.85 – 10
14.9 – 16
6.5 – 7.4
3
8
12 11.8 – 12
17.7 – 19
7.5 – 8.4
3.6
9.5
16 15.8 – 16
23.7 – 25
10 – 10.9
4.8
13
20 19.8 – 20
30.7 – 32
13 – 13.9
6
16.5
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 3 2.8 – 3.2
4 3.7 – 4.3
5 4.7 – 5.3
6 5.7 – 6.3
8 7.7 – 8.3
10 9.7 – 10.3
12 11.6 – 12.4
16 15.6 – 16.4
20 19.5 – 20.5
25 24.5 – 25.5
30 29.5 – 30.5
35 34.5 – 35.5
40 39.5 – 40.5
Size sheet · DIN 1476
1.4
d1 pin diameter 1.35 – 1.4
dk 2.2 – 2.6
k head height 0.7 – 0.9
c 0.42
r radius of the spherical head 1.4 Standard lengths
3 · 4 · 5 · 6
Size sheet · DIN 1476
1.6
d1 pin diameter 1.55 – 1.6
dk 2.6 – 3
k head height 0.9 – 1.1
c 0.48
r radius of the spherical head 1.6 Standard lengths
3 · 4 · 5 · 6 · 8
Size sheet · DIN 1476
2
d1 pin diameter 1.95 – 2
dk 3.3 – 3.7
k head height 1.1 – 1.3
c 0.6
r radius of the spherical head 1.9 Standard lengths
3 · 4 · 5 · 6 · 8 · 10
Size sheet · DIN 1476
2.5
d1 pin diameter 2.425 – 2.5
dk 4.2 – 4.6
k head height 1.4 – 1.6
c 0.75
r radius of the spherical head 2.4 Standard lengths
3 · 4 · 5 · 6 · 8 · 10 · 12
Size sheet · DIN 1476
3
d1 pin diameter 2.925 – 3
dk 4.95 – 5.45
k head height 1.65 – 1.95
c 0.9
r radius of the spherical head 2.8 Standard lengths
4 · 5 · 6 · 8 · 10 · 12 · 16
Size sheet · DIN 1476
4
d1 pin diameter 3.9 – 4
dk 6.75 – 7.25
k head height 2.25 – 2.55
c 1.2
r radius of the spherical head 3.8 Standard lengths
5 · 6 · 8 · 10 · 12 · 16 · 20
Size sheet · DIN 1476
5
d1 pin diameter 4.9 – 5
dk 8.5 – 9.1
k head height 2.85 – 3.15
c 1.5
r radius of the spherical head 4.6 Standard lengths
6 · 8 · 10 · 12 · 16 · 20 · 25
Size sheet · DIN 1476
6
d1 pin diameter 5.9 – 6
dk 10.2 – 10.8
k head height 3.45 – 3.75
c 1.8
r radius of the spherical head 5.7 Standard lengths
8 · 10 · 12 · 16 · 20 · 25 · 30
Size sheet · DIN 1476
8
d1 pin diameter 7.85 – 8
dk 13.6 – 14.4
k head height 4.6 – 5
c 2.4
r radius of the spherical head 7.5 Standard lengths
10 · 12 · 16 · 20 · 25 · 30 · 35 · 40
Size sheet · DIN 1476
10
d1 pin diameter 9.85 – 10
dk 14.9 – 16
k head height 6.5 – 7.4
c 3
r radius of the spherical head 8 Standard lengths
12 · 16 · 20 · 25 · 30 · 35 · 40
Size sheet · DIN 1476
12
d1 pin diameter 11.8 – 12
dk 17.7 – 19
k head height 7.5 – 8.4
c 3.6
r radius of the spherical head 9.5 Standard lengths
16 · 20 · 25 · 30 · 35 · 40
Size sheet · DIN 1476
16
d1 pin diameter 15.8 – 16
dk 23.7 – 25
k head height 10 – 10.9
c 4.8
r radius of the spherical head 13 Standard lengths
20 · 25 · 30 · 35 · 40
Size sheet · DIN 1476
20
d1 pin diameter 19.8 – 20
dk 30.7 – 32
k head height 13 – 13.9
c 6
r radius of the spherical head 16.5 Standard lengths
25 · 30 · 35 · 40
Provenance
Draft — values taken from a single source and not yet cross-checked.
Accessed 2026-09-23 · For design and safety-critical use, consult the current edition of the standard.
Data notes (2) The source publishes one identical table for DIN 1476, ISO 8746. Dimensionally identical to ISO 8746 per the Würth DIN→ISO changeover table ("nothing noteworthy"); the table was verified against the ISO 8746 preview.