Dimensions mm · values as the standard states them Size P d1 d3 d7 h3 h4 t3 M5 0.8 25
15
12
8
16
≥ 9.5
M6 1 32
18
14
10
20
≥ 12
M8 1.25 40
21
18
13
25
≥ 14
M10 1.5 50
25
22
20
32
≥ 18
M12 1.75 63
32
26
25
40
≥ 22
M16 2 80
40
35
30
50
≥ 30
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 6335 K
M5
d1 large diameter head 25
d3 small head diameter 15
d7 stem diameter 12
h3 hight till head 8
h4 total height 16
t3 length of the thread ≥ 9.5 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 6335 K
M6
d1 large diameter head 32
d3 small head diameter 18
d7 stem diameter 14
h3 hight till head 10
h4 total height 20
t3 length of the thread ≥ 12 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 6335 K
M8
d1 large diameter head 40
d3 small head diameter 21
d7 stem diameter 18
h3 hight till head 13
h4 total height 25
t3 length of the thread ≥ 14 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 6335 K
M10
d1 large diameter head 50
d3 small head diameter 25
d7 stem diameter 22
h3 hight till head 20
h4 total height 32
t3 length of the thread ≥ 18 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 6335 K
M12
d1 large diameter head 63
d3 small head diameter 32
d7 stem diameter 26
h3 hight till head 25
h4 total height 40
t3 length of the thread ≥ 22 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 6335 K
M16
d1 large diameter head 80
d3 small head diameter 40
d7 stem diameter 35
h3 hight till head 30
h4 total height 50
t3 length of the thread ≥ 30 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.