Hexagon Slotted and Castle Nuts, Style 1 - Fine Pitch Thread - Product Grades A and B
GB 9457 - 1988 1型六角开槽螺母及皇冠螺母 细牙 产品等级：A和B级
See all versions and complete specifications: Hexagon Slotted and Castle Nuts, Style 1 - Fine Pitch Thread - Product Grades A and B — Full Specification Page
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M8 | 1 | 15.73 | 16 | 17.77 | 12.4 | （1.25） | / | 3.4 | 2.8 | / | 11.97 |
| M10 | 1.5 | 20.67 | 21 | 23.36 | 17.8 | / | / | 4.25 | 3.5 | / | 17.37 |
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| M12 |
| 1.5 |
| 26.16 |
| 27 |
| 29.56 |
| 21.8 |
| / |
| 25 |
| 5.7 |
| 4.5 |
| 24.16 |
| 20.96 |
| M16 | 2 | 40 | 41 | 45.2 | 31.8 | / | 38 | 6.7 | 5.5 | 37 | 30.8 |
| M20 | 3 | 53.8 | 55 | 60.79 | 40 | / | 50 | 8.5 | 7 | 49 | 39 |
| (M14) | 1.5 | 33 | 34 | 37.29 | 27.4 | / | 30 | 6.7 | 5.5 | 29.16 | 26.56 |
| (M18) | 2 | 49 | 50 | 55.37 | 37.7 | / | 46 | 8.5 | 7 | 45 | 36.7 |
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