Dimensions mm · values as the standard states them Size P t d2 f 6 6
M4
0.8
8 8
M5
1
10 10
M6
1.2
12 12
M8
1.6
14 12
M8
1.6
16 16
M10
2
20 18
M12
2.5
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.
Size sheet · DIN 7978
6
t the depth of the hole (is not less than) 6
d2 the nominal diameter of the thread M4
f 0.8 Size sheet · DIN 7978
8
t the depth of the hole (is not less than) 8
d2 the nominal diameter of the thread M5
f 1 Size sheet · DIN 7978
10
t the depth of the hole (is not less than) 10
d2 the nominal diameter of the thread M6
f 1.2 Size sheet · DIN 7978
12
t the depth of the hole (is not less than) 12
d2 the nominal diameter of the thread M8
f 1.6 Size sheet · DIN 7978
14
t the depth of the hole (is not less than) 12
d2 the nominal diameter of the thread M8
f 1.6 Size sheet · DIN 7978
16
t the depth of the hole (is not less than) 16
d2 the nominal diameter of the thread M10
f 2 Size sheet · DIN 7978
20
t the depth of the hole (is not less than) 18
d2 the nominal diameter of the thread M12
f 2.5 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 (1) The source publishes one identical table for DIN 7978, ISO 8736. The DIN and ISO versions are dimensionally identical per the Würth DIN→ISO changeover table; not independently verified against the ISO preview.