Dimensions mm · values as the standard states them Size P d1 d2 d3 d6 h1 h3 t2 M6 1 32
12
18
6.4
21
10
10
M8 1.25 40
14
21
8.4
26
14
13
M10 1.5 50
18
25
10.5
34
20
16
M12 1.75 63
20
32
13
42
25
20
M16 2 80
25
40
17
52
30
20
M20 2.5 100
32
48
21
65
38
25
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 D
M6
d1 large diameter head 32
d2 stem diameter 12
d3 small head diameter 18
d6 hole diameter 6.4
h1 total height 21
h3 hight till head 10
t2 length of the thread 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 6335 D
M8
d1 large diameter head 40
d2 stem diameter 14
d3 small head diameter 21
d6 hole diameter 8.4
h1 total height 26
h3 hight till head 14
t2 length of the thread 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 6335 D
M10
d1 large diameter head 50
d2 stem diameter 18
d3 small head diameter 25
d6 hole diameter 10.5
h1 total height 34
h3 hight till head 20
t2 length of the thread 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 6335 D
M12
d1 large diameter head 63
d2 stem diameter 20
d3 small head diameter 32
d6 hole diameter 13
h1 total height 42
h3 hight till head 25
t2 length of the thread 20 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 D
M16
d1 large diameter head 80
d2 stem diameter 25
d3 small head diameter 40
d6 hole diameter 17
h1 total height 52
h3 hight till head 30
t2 length of the thread 20 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 6335 D
M20
d1 large diameter head 100
d2 stem diameter 32
d3 small head diameter 48
d6 hole diameter 21
h1 total height 65
h3 hight till head 38
t2 length of the thread 25 Thread · ISO 261/262
Pitch P 2.5
d2 18.376
d3 16.933
Tap drill 17.5
Stress area As 244.79 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.