Dimensions mm · values as the standard states them Size P k h n dc N S M5 0.8 4.7 – 5
1.7
4
15.5
2.9
8
M6 1 6.64 – 7
2
5
18.5
5.7
10
M8 1.25 9.64 – 10
2.5
6
22.5
12.2
13
M10 1.5 12.57 – 13
3
7
26.5
21.8
16
M12 1.75 14.57 – 15
3
8
30.5
29.4
18
M14 2 16.16 – 17
4
8
33.5
45.8
21
M16 2 18.66 – 19.5
4
8
36.5
63.1
24
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 977
M5
k 4.7 – 5
h width of the ring (no more than) 1.7
n tooth width 4
dc outer diameter of the ring 15.5
N 2.9
S 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 977
M6
k 6.64 – 7
h width of the ring (no more than) 2
n tooth width 5
dc outer diameter of the ring 18.5
N 5.7
S 10 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 977
M8
k 9.64 – 10
h width of the ring (no more than) 2.5
n tooth width 6
dc outer diameter of the ring 22.5
N 12.2
S 13 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 977
M10
k 12.57 – 13
h width of the ring (no more than) 3
n tooth width 7
dc outer diameter of the ring 26.5
N 21.8
S 16 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 977
M12
k 14.57 – 15
h width of the ring (no more than) 3
n tooth width 8
dc outer diameter of the ring 30.5
N 29.4
S 18 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 977
M14
k 16.16 – 17
h width of the ring (no more than) 4
n tooth width 8
dc outer diameter of the ring 33.5
N 45.8
S 21 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 977
M16
k 18.66 – 19.5
h width of the ring (no more than) 4
n tooth width 8
dc outer diameter of the ring 36.5
N 63.1
S 24 Thread · ISO 261/262
Pitch P 2
d2 14.701
d3 13.546
Tap drill 14
Stress area As 156.67 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.