DIN 557
| Current norm | DIN 557 | Square nuts; product grade C |
| Current release: 1994-01 | ||
| Changes: | thread M20 cancelled | |
| Drawing: |  |
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| Ware groups: | ||
| Current norm | DIN 557 | Square nuts; product grade C |
| Current release: 1994-01 | ||
| Changes: | thread M20 cancelled | |
| Drawing: | |
|
| Ware groups: | ||
