Steel – 140HV, 200HV (galvanized zinc, zinc-coated, hot-dip galvanized);
Stainless steel – A2-70; A2-80; A4-70; A4-80;
Brass, polyamide PA6
| d | d1 | d2 | s |
| М3 | 3.2 | 9 | 0.8 |
| М3.5 | 3.7 | 11 | 0.8 |
| M4 | 4.3 | 12 | 1 |
| M5 | 5.3 | 15 | 1.2 |
| M6 | 6.4 | 18 | 1.6 |
| M7 | 7.4 | 22 | 2 |
| M8 | 8.4 | 24 | 2 |
| M10 | 10.5 | 30 | 2.5 |
| М12 | 13 | 37 | 3 |
| М14 | 15 | 44 | 3 |
| М16 | 17 | 50 | 3 |
| М18 | 20 | 56 | 4 |
| M20 | 22 | 60 | 4 |
| М22 | 23/24 | 66 | 5 |
| М24 | 26 | 72 | 5 |
| М27 | 30 | 85 | 6 |
| М30 | 33 | 92 | 6 |
| М33 | 36 | 105 | 6 |
| М36 | 39 | 110 | 8 |
Analogs of DIN 9021:
GOST 6958-78 – enlarged washers of accuracy classes A and C for fasteners with thread diameters from 1 to 48 mm. Comparison of DIN 9021 and GOST 6958-78 standards for enlarged washers.
ISO 7093-1 – enlarged flat washers of accuracy class A.
ISO 7093-2 – enlarged flat washers of accuracy class C.
Marking
d – thread size of the fastener
d1 – inner diameter of the washer
d2 – outer diameter of the washer
s – thickness