Dimensions mm · values as the standard states them Size P t n 1.4 ≥ 0.8
0.4
2 ≥ 1.12
0.6
2.5 ≥ 1.28
0.8
3 ≥ 1.6
1
5 ≥ 2
1.2
6 ≥ 2.4
1.6
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 438
1.4
t groove depth ≥ 0.8
n groove width 0.4 Standard lengths
3 · 4 · 5 · 6 · 8 · 10 · 12 · 14 · 16 · 18 · 20 · 22 · 25
Size sheet · DIN 438
2
t groove depth ≥ 1.12
n groove width 0.6 Standard lengths
4 · 5 · 6 · 8 · 10 · 12 · 14 · 16 · 18 · 20 · 22 · 25
Size sheet · DIN 438
2.5
t groove depth ≥ 1.28
n groove width 0.8 Standard lengths
5 · 6 · 8 · 10 · 12 · 14 · 16 · 18 · 20 · 22 · 25 · 28 · 30
Size sheet · DIN 438
3
t groove depth ≥ 1.6
n groove width 1 Standard lengths
5 · 6 · 8 · 10 · 12 · 14 · 16 · 18 · 20 · 22 · 25 · 28 · 30 · 35
Size sheet · DIN 438
5
t groove depth ≥ 2
n groove width 1.2 Standard lengths
8 · 10 · 12 · 14 · 16 · 18 · 20 · 22 · 25 · 28 · 30 · 35 · 40
Size sheet · DIN 438
6
t groove depth ≥ 2.4
n groove width 1.6 Standard lengths
10 · 12 · 14 · 16 · 18 · 20 · 22 · 25 · 28 · 30 · 35 · 40
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 (2) The source publishes one identical table for DIN 438, ISO 7436. Dimensionally identical to ISO 7436 per the Würth DIN→ISO changeover table ("nothing noteworthy"); the table was verified against the ISO 7436 preview.