1.小ねじ 規格
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| ナベ | 皿・丸皿 | トラス | バインド | |||||
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| 頭径 | 高さ | 頭径 | 高さ | 頭径 | 高さ | 頭径 | 高さ | |
| M2 | 3.5 | 1.3 | 4 | 1.2 | 4.5 | 1.2 | 4.3 | 1.2 |
| M2.3 | 4 | 1.5 | 4.6 | 1.35 | 5.2 | 1.4 | 4.9 | 1.4 |
| M2.5 | 4.5 | 1.7 | 5 | 1.45 | 5.7 | 1.5 | 5.3 | 1.5 |
| M2.6 | 4.5 | 1.7 | 5.2 | 1.5 | 5.9 | 1.6 | 5.5 | 1.6 |
| M3 | 5.5 | 2 | 6 | 1.75 | 6.9 | 1.9 | 6.3 | 1.9 |
| M3.5 | 6 | 2.3 | 7 | 2 | 8.1 | 2.2 | 7.3 | 2.2 |
| M4 | 7 | 2.6 | 8 | 2.3 | 9.4 | 2.5 | 8.3 | 2.5 |
| M5 | 9 | 3.3 | 10 | 2.8 | 11.8 | 3.1 | 10.3 | 3.1 |
| M6 | 10.5 | 3.9 | 12 | 3.4 | 14 | 3.7 | 12.4 | 3.7 |
| M8 | 14 | 5.2 | 16 | 4.4 | 17.8 | 4.8 | 16.4 | 4.8 |
| M10 | 19 | 6 | 20 | 5.7 | 21 | 5.1 | - | - |
| M12 | - | - | 24 | 6.7 | - | - | - | - |
