Castle Nuts, Black Grade
IS 2232 - 1967 槽形/冠形六角螺母（粗制）
See all versions and complete specifications: Castle Nuts, Black Grade — Full Specification Page
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| M12 | 16 | 3.2 | 9.9 | 3.5 | 16.55 | 15.45 | 22 | 21.16 | 11 | 3.8 |
| M16 | 26 | 5 | 16.9 | 5.5 | 26.65 | 25.35 | 32 | 31 | 18 | 5.8 |
| M20 | 35 | 6.3 | 24.7 | 7 | 35.8 | 34.2 | 50 | 49 | 26 | 7.36 |
| M24 | 48 | 8 | 34.4 | 9 | 48.8 | 47.2 | 70 | 68.8 |
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| 36 |
| 9.36 |
| (M14) | 21 | 4 | 13.9 | 4.5 | 21.65 | 20.35 | 27 | 26.16 | 15 | 4.8 |
| (M18) | 30 | 5 | 20.7 | 5.5 | 30.65 | 29.35 | 41 | 40 | 22 | 5.8 |
| (M22) | 40 | 6.3 | 29.4 | 7 | 40.8 | 39.2 | 60 | 58.8 | 31 | 7.36 |
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