Dimensions mm · values as the standard states them Size P b d2 d3 L2 5 14
5.5
M5
25
6 18
6.6
M6
30
8 22
8.8
M8
40
10 24
10.9
M10
45
12 27
13.1
M12
55
16 35
17.4
M16
72
20 35
21.7
M16
85
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 258
5
b length of the thread 14
d2 pin diameter 5.5
d3 the nominal diameter of the thread M5
L2 25 Size sheet · DIN 258
6
b length of the thread 18
d2 pin diameter 6.6
d3 the nominal diameter of the thread M6
L2 30 Size sheet · DIN 258
8
b length of the thread 22
d2 pin diameter 8.8
d3 the nominal diameter of the thread M8
L2 40 Size sheet · DIN 258
10
b length of the thread 24
d2 pin diameter 10.9
d3 the nominal diameter of the thread M10
L2 45 Size sheet · DIN 258
12
b length of the thread 27
d2 pin diameter 13.1
d3 the nominal diameter of the thread M12
L2 55 Size sheet · DIN 258
16
b length of the thread 35
d2 pin diameter 17.4
d3 the nominal diameter of the thread M16
L2 72 Size sheet · DIN 258
20
b length of the thread 35
d2 pin diameter 21.7
d3 the nominal diameter of the thread M16
L2 85 Provenance
Draft — values taken from a single source and not yet cross-checked.
fasteners.eu dimensions, lengths, materials, property classes, current norm, equivalent norms Otto Roth status Accessed 2026-09-23 · For design and safety-critical use, consult the current edition of the standard.
Data notes (1) The source publishes one identical table for DIN 258, ISO 8737. Kept as the DIN table (the source lists the DIN as the current norm); equivalence with the ISO standard is not verified.