출처: 메카피아

유니파이 가는나사 드릴 아래 구멍(하혈경)
나사의 호칭
드릴 직경
No.0-80UNF
1.25
No.1-72UNF
1.55
No.2-64UNF
1.85
No.3-56UNF
2.1
No.4-48UNF
2.4
No.5-44UNF
2.7
No.6-40UNF
2.9
No.8-36UNF
3.5
No.10-32UNF
4.1
No.12-28UNF
4.6
1 / 4-28UNF
5.5
5 / 16-24UNF
6.9
3 / 8-24UNF
8.5
7 / 16-20UNF
9.9
1 / 2-20UNF
11.5
9 / 16-18UNF
12.9
5 / 8-18UNF
14.5
3 / 4-16UNF
17.5
7 / 8-14UNF
20.5
1-12UNF
23.2
1-1 / 8-12UNF
26.5
1-1 / 4-12UNF
29.5
1-3 / 8-12UNF
32.8
1-1 / 2-12UNF
36

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