ねじ下穴径表：インサートコイルねじ用
| 単位(mm) |
| 呼び |
下穴径 |
ドリル径（参考） |
| Max. |
Min. |
| M2×0.4 |
2.16 |
2.10 |
2.13 |
| M2.5×0.45 |
2.68 |
2.62 |
2.65 |
| M2.6×0.45 |
2.78 |
2.70 |
2.70 |
| M3×0.5 |
3.20 |
3.12 |
3.15 |
| M4×0.7 |
4.30 |
4.17 |
4.2 |
| M5×0.8 |
5.33 |
5.16 |
5.2 |
| M6×1 |
6.42 |
6.25 |
6.3 |
| M8×1.25 |
8.52 |
8.31 |
8.4 |
| M10×1.5 |
10.62 |
10.37 |
10.5 |
| M10×1.25 |
10.52 |
10.31 |
10.4 |
| M10×1 |
10.42 |
10.25 |
10.3 |
| M12×1.75 |
12.73 |
12.43 |
12.6 |
| M12×1.5 |
12.62 |
12.37 |
12.5 |
| M12×1.25 |
12.52 |
12.31 |
12.4 |
| M14×2 |
14.83 |
14.49 |
14.7 |
| M14×1.5 |
14.62 |
14.37 |
14.5 |
| M14×1.25 |
14.52 |
14.31 |
14.4 |
| M16×2 |
16.83 |
16.49 |
16.7 |
| M16×1.5 |
16.62 |
16.37 |
16.5 |
| M18×2.5 |
19.04 |
18.58 |
18.9 |
| M18×1.5 |
18.62 |
18.37 |
18.5 |
| M20×2.5 |
21.04 |
20.58 |
20.9 |
| M20×1.5 |
20.62 |
20.37 |
20.5 |
| M22×2.5 |
23.04 |
22.58 |
22.9 |
| M22×1.5 |
22.62 |
22.37 |
22.5 |
| M24×3 |
25.25 |
24.70 |
25.1 |
| M24×1.5 |
24.62 |
24.38 |
24.5 |
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ねじ下穴径表(切削加工用)
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ねじ下穴径表(転造タップ用)
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計算機
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その他
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