技術資料 ユニファイ並目ねじ
| ユニファイ並目ねじの呼びと下穴径 mm |
| ねじの呼び | 下穴径最小 （ひっかかり率） |
下穴径最大(%) | |
| 3B | 2B 1B | ||
| No. 1-64 UNC | 1.42 (100%) | 1.57 (65%) | 1.57 (65%) |
| 2-56 UNC | 1.69 (〃) | 1.86 (〃) | 1.86 (〃) |
| 3-48 UNC | 1.94 (〃) | 2.14 (〃) | 2.14 (〃) |
| 4-40 UNC | 2.16 (〃) | 2.36 (70%) | 2.36 (70%) |
| 5-40 UNC | 2.49 (〃) | 2.69 (〃) | 2.69 (〃) |
| 6-32 UNC | 2.65 (〃) | 2.86 (70%) | 2.86 (75%) |
| 8-32 UNC | 3.31 (〃) | 3.52 (〃) | 3.52 (〃) |
| 10-24 UNC | 3.68 (〃) | 3.91 (80%) | 3.91 (80%) |
| 12-24 UNC | 4.34 (〃) | 4.51 (85%) | 4.57 (〃) |
| 1/4-20 UNC | 4.98 (〃) | 5.25 (80%) | 5.25 (〃) |
| 5/16-18 UNC | 6.41 (〃) | 6.64 (85%) | 6.72 (〃) |
| 3/8-16 UNC | 7.81 (〃) | 8.06 (〃) | 8.15 (〃) |
| 7/16-14 UNC | 9.15 (〃) | 9.40 (〃) | 9.50 (〃) |
| 1/2-13 UNC | 10.60 (〃) | 10.80 (90%) | 11.00 (〃) |
| 9/16-12 UNC | 12.00 (〃) | 12.30 (85%) | 12.30 (85%) |
| 5/8-11 UNC | 13.40 (〃) | 13.60 (90%) | 13.80 (〃) |
| 3/4-10 UNC | 16.30 (〃) | 16.60 (〃) | 16.80 (80%) |
| 7/8- 9 UNC | 19.20 (〃) | 19.50 (〃) | 19.60 (85%) |
| 1 - 8 UNC | 22.00 (〃) | 22.30 (〃) | 22.50 (〃) |
| 1 1/8- 7 UNC | 24.60 (〃) | 25.00 (〃) | 25.20 (〃) |
| 1 1/4- 7 UNC | 27.80 (〃) | 28.20 (〃) | 28.40 (〃) |
| 1 3/8 - 6 UNC | 30.30 (〃) | 30.80 (〃) | 31.00 (〃) |
| 1 1/2- 6 UNC | 33.50 (〃) | 34.00 (〃) | 34.20 (〃) |
| 1 3/4- 5 UNC | 39.00 (〃) | 39.50 (〃) | 39.80 (〃) |
| 2 - 4 1/2 UNC | 44.70 (〃) | 45.30 (〃) | 45.30 (90%) |
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