Dimensions mm · values as the standard states them Size P d1 h d2 1.6 1.8
1.8 – 2.05
0.3
0.2 – 0.4
4
3.25 – 4
2 2.4
2.4 – 2.65
0.3
0.2 – 0.4
5
4.25 – 5
2.5 2.9
2.9 – 3.15
0.5
0.4 – 0.6
6
5.25 – 6
3 3.4
3.4 – 3.7
0.5
0.4 – 0.6
7
6.1 – 7
4 4.5
4.5 – 4.8
0.8
0.6 – 1
9
8.1 – 9
5 5.5
5.5 – 5.8
1
0.8 – 1.2
10
9.1 – 10
6 6.6
6.6 – 6.96
1.6
1.3 – 1.9
12
10.9 – 12
8 9
9 – 9.36
1.6
1.3 – 1.9
16
14.9 – 16
10 11
11 – 11.43
2
1.7 – 2.3
20
18.7 – 20
12 13.5
13.5 – 13.93
2.5
2.2 – 2.8
24
22.7 – 24
16 17.5
17.5 – 17.93
3
2.4 – 3.6
30
28.7 – 30
20 22
22 – 22.52
3
2.4 – 3.6
37
35.4 – 37
24 26
26 – 26.52
4
3.4 – 4.6
44
42.4 – 44
30 33
33 – 33.62
4
3.4 – 4.6
56
54.1 – 56
42 45
45 – 46
8
6.8 – 9.2
78
76.1 – 78
48 52
52 – 53.2
8
6.8 – 9.2
92
89.8 – 92
56 62
62 – 63.2
10
8.8 – 11.2
105
102.8 – 105
64 70
70 – 71.2
10
8.8 – 11.2
115
112.8 – 115
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 · ISO 7091
1.6
d1 inside diameter 1.8
h thickness 0.3
d2 outside diameter 4 Size sheet · ISO 7091
2
d1 inside diameter 2.4
h thickness 0.3
d2 outside diameter 5 Size sheet · ISO 7091
2.5
d1 inside diameter 2.9
h thickness 0.5
d2 outside diameter 6 Size sheet · ISO 7091
3
d1 inside diameter 3.4
h thickness 0.5
d2 outside diameter 7 Size sheet · ISO 7091
4
d1 inside diameter 4.5
h thickness 0.8
d2 outside diameter 9 Size sheet · ISO 7091
5
d1 inside diameter 5.5
h thickness 1
d2 outside diameter 10 Size sheet · ISO 7091
6
d1 inside diameter 6.6
h thickness 1.6
d2 outside diameter 12 Size sheet · ISO 7091
8
d1 inside diameter 9
h thickness 1.6
d2 outside diameter 16 Size sheet · ISO 7091
10
d1 inside diameter 11
h thickness 2
d2 outside diameter 20 Size sheet · ISO 7091
12
d1 inside diameter 13.5
h thickness 2.5
d2 outside diameter 24 Size sheet · ISO 7091
16
d1 inside diameter 17.5
h thickness 3
d2 outside diameter 30 Size sheet · ISO 7091
20
d1 inside diameter 22
h thickness 3
d2 outside diameter 37 Size sheet · ISO 7091
24
d1 inside diameter 26
h thickness 4
d2 outside diameter 44 Size sheet · ISO 7091
30
d1 inside diameter 33
h thickness 4
d2 outside diameter 56 Size sheet · ISO 7091
42
d1 inside diameter 45
h thickness 8
d2 outside diameter 78 Size sheet · ISO 7091
48
d1 inside diameter 52
h thickness 8
d2 outside diameter 92 Size sheet · ISO 7091
56
d1 inside diameter 62
h thickness 10
d2 outside diameter 105 Size sheet · ISO 7091
64
d1 inside diameter 70
h thickness 10
d2 outside diameter 115 Provenance
Reviewed — dimensions cross-checked against the official ISO preview; values match.
Accessed 2026-09-23 · For design and safety-critical use, consult the current edition of the standard.
Data notes (3) Dimensions cross-checked against the official ISO 7091:2000 preview — values match. Only sizes whose values were found in the ISO 7091 table are published (18 sizes). The source publishes one identical table for DIN 126, ISO 7091.