ねじ下穴径寸法表 – メートル並目ねじ
※推奨下穴径は、旧JIS2級目ねじ用です。
メートル並目ねじ |
ねじの呼び |
推奨下穴径 |
最小下穴径 |
M1 X 0.25 |
0.75 |
0.73 |
M1.1 X 0.25 |
0.85 |
0.83 |
M1.2 X 0.25 |
0.95 |
0.93 |
M1.4 X 0.3 |
1.1 |
1.08 |
M1.6 X 0.35 |
1.25 |
1.23 |
M1.8 X 0.35 |
1.45 |
1.43 |
M2 X 0.4 |
1.6 |
1.57 |
M2.2 X 0.45 |
1.75 |
1.72 |
M3 X 0.5 |
2.05 |
2.02 |
M3.5 X 0.6 |
2.5 |
2.46 |
M4 X 0.7 |
3.3 |
3.25 |
M4.5 X 0.75 |
3.75 |
3.69 |
M5 X 0.8 |
4.2 |
4.14 |
M6 X 1 |
5 |
4.92 |
M7 X 1 |
6 |
5.92 |
M8 X 1.25 |
6.75 |
6.65 |
M9 X 1.25 |
7.75 |
7.65 |
M10 X 1.5 |
8.5 |
8.38 |
M11 X 1.5 |
9.5 |
9.38 |
M12 X 1.75 |
10.25 |
10.11 |
M14 X 2 |
12 |
11.84 |
M16 X 2 |
14 |
13.9 |
M18 X 2.5 |
15.5 |
15.3 |
M20 X 2.5 |
17.5 |
17.3 |
M22 X 2.5 |
19.5 |
19.3 |
M24 X 3 |
21 |
20.8 |
M27 X 3 |
24 |
23.8 |
M30 X 2.5 |
26.5 |
26.3 |
M33 X 3.5 |
29.5 |
29.3 |
M36 X 4 |
32 |
31.7 |
M39 X 4 |
35 |
34.7 |
M42 X 4.5 |
37.5 |
37.2 |
M45 X 4.5 |
40.5 |
40.2 |
M48 X 5 |
43 |
42.6 |
M52 X 5 |
47 |
46.6 |
M56 X 5.5 |
50.5 |
50.1 |
M60 X 5.5 |
54.5 |
54.1 |
M64 X 6 |
58 |
57.6 |
M68 X 6 |
62 |
61.6 |
ねじ下穴径寸法表 – メートル細目ねじ
※推奨下穴径は、旧JIS2級目ねじ用です。
メートル細目ねじ |
ねじの呼び |
推奨下穴径 |
最小下穴径 |
M2.5 X 0.35 |
21.5 |
2.13 |
M3 X 0.35 |
2.65 |
2.63 |
M3.5 X 0.35 |
3.15 |
3.13 |
M4 X 0.75 |
3.25 |
3.19 |
M4 X 0.5 |
3.5 |
3.46 |
M4.5 X 0.5 |
4 |
3.96 |
M5 X 0.5 |
4.5 |
4.46 |
M6 X 0.75 |
5.25 |
5.19 |
M7 X 0.75 |
6.25 |
6.19 |
M8 X 1 |
7 |
6.92 |
M8 X 0.75 |
7.25 |
7.19 |
M9 X 1 |
8 |
7.92 |
M9 X 0.75 |
8.25 |
8.19 |
M10 X 1.25 |
8.75 |
8.65 |
M10 X 1 |
9 |
8.92 |
M10 X 0.75 |
9.25 |
9.19 |
M11 X 1.25 |
9.75 |
9.65 |
M11 X 1 |
10 |
9.92 |
M11 X 0.75 |
10.25 |
10.19 |
M12 X 1.5 |
10.5 |
10.38 |
M12 X 1.25 |
10.75 |
10.65 |
M12 X 1 |
11 |
10.92 |
M14 X 1.5 |
12.5 |
12.38 |
M14 X 1.25 |
12.75 |
12.65 |
M14 X 1 |
13 |
12.92 |
M15 X 1.5 |
13.5 |
13.4 |
M15 X 1.25 |
13.8 |
13.7 |
M15 X 1 |
14 |
13.95 |
M16 X 1.5 |
14.5 |
14.4 |
M16 X 1 |
15 |
14.95 |
M16 X 0.5 |
15.5 |
15.46 |
M17 X 1.5 |
15.5 |
15.4 |
M17 X 1 |
16 |
15.95 |
M18 X 2 |
16 |
15.9 |
M18 X 1.5 |
16.5 |
16.4 |
M18 X 1 |
17 |
16.95 |
M18 X 0.5 |
17.5 |
17.46 |
M20 X 2 |
18 |
17.9 |
M20 X 1.5 |
18.5 |
18.4 |
M20 X 1 |
19 |
18.95 |
M20 X 0.5 |
19.5 |
19.46 |
M22 X 2 |
20 |
19.9 |
M22 X 1.5 |
20.5 |
20.4 |
M22 X 1 |
21 |
20.95 |
M22 X 0.5 |
21.5 |
21.46 |
M24 X 2 |
22 |
21.9 |
M24 X 1.5 |
22.5 |
22.4 |
M24 X 1 |
23 |
22.95 |
M25 X 2 |
23 |
22.9 |
M25 X 1.5 |
23.5 |
23.4 |
M25 X 1 |
24 |
23.95 |
M26 X 1.5 |
24.5 |
24.4 |
M26 X 1 |
25 |
24.95 |
M27 X 2 |
25 |
24.9 |
M27 X 1.5 |
25.5 |
25.4 |
M27 X 1 |
26 |
25.95 |
M28 X 2 |
26 |
25.9 |
M28 X 1.5 |
26.5 |
26.4 |
M28 X 1 |
27 |
26.95 |
M30 X 3 |
27 |
26.8 |
M30 X 2 |
28 |
27.9 |
M30 X 1.5 |
28.5 |
28.4 |
M30 X 1 |
29 |
28.95 |
M32 X 2 |
30 |
29.9 |
M32 X 1.5 |
30.5 |
30.4 |
M32 X 1 |
31 |
30.95 |
M33 X 3 |
30 |
29.8 |
M33 X 2 |
31 |
30.9 |
M33 X 1.5 |
31.5 |
31.4 |
M35 X 1.5 |
33.5 |
33.4 |
M36 X 3 |
33 |
32.8 |
M36 X 2 |
34 |
33.9 |
M36 X 1.5 |
34.5 |
34.4 |
M38 X 1.5 |
36.5 |
36.4 |
M38 X 1 |
37 |
36.95 |
M39 X 3 |
36 |
35.8 |
M39 X 2 |
37 |
36.9 |
M39 X 1.5 |
37.5 |
37.4 |
M40 X 3 |
37 |
36.8 |
M40 X 2 |
38 |
37.9 |
M40 X 1.5 |
38.5 |
38.4 |
M42 X 4 |
38 |
37.7 |
M42 X 3 |
39 |
38.8 |
M42 X 2 |
40 |
39.9 |
M42 X 1.5 |
40.5 |
40.4 |
M42 X 1 |
41 |
40.95 |
M45 X 4 |
41 |
40.7 |
M45 X 3 |
42 |
41.8 |
M45 X 2 |
43 |
42.9 |
M45 X 1.5 |
43.5 |
43.4 |
M48 X 4 |
44 |
43.7 |
M48 X 3 |
45 |
44.8 |
M48 X 2 |
46 |
45.9 |
M48 X 1.5 |
46.5 |
46.4 |
M50 X 3 |
47 |
46.8 |
M50 X 2 |
48 |
47.9 |
M50 X 1.5 |
48.5 |
48.4 |
M52 X 4 |
48 |
47.7 |
M52 X 3 |
49 |
48.8 |
M52 X 2 |
50 |
49.9 |
M52 X 1.5 |
50.5 |
50.4 |
M55 X 4 |
51 |
50.7 |
M55 X 3 |
52 |
51.8 |
M55 X 2 |
52 |
51.9 |
M55 X 1.5 |
53.5 |
53.4 |
M56 X 4 |
52 |
51.7 |
M56 X 3 |
53 |
52.8 |
M56 X 2 |
54 |
53.9 |
M56 X 1.5 |
54.5 |
54.4 |
M58 X 4 |
54 |
53.7 |
M58 X 3 |
55 |
54.8 |
M58 X 2 |
56 |
55.9 |
M58 X 1.5 |
56.5 |
56.4 |
M60 X 4 |
56 |
55.7 |
M60 X 3 |
57 |
56.8 |
M60 X 2 |
58 |
57.9 |
M60 X 1.5 |
58.5 |
58.4 |
M62 X 4 |
58 |
57.7 |
M62 X 3 |
59 |
58.8 |
M62 X 2 |
60 |
59.9 |
M62 X 1.5 |
60.5 |
60.4 |
M64 X 4 |
60 |
59.7 |
M64 X 3 |
61 |
60.8 |
M64 X 2 |
62 |
61.9 |
M64 X 1.5 |
62.5 |
62.4 |
M65 X 4 |
61 |
60.7 |
M65 X 3 |
62 |
61.8 |
M65 X 2 |
63 |
62.9 |
M65 X 1.5 |
63.5 |
63.4 |
M68 X 4 |
64 |
63.7 |
M68 X 3 |
65 |
64.8 |
M68 X 2 |
66 |
65.9 |
M68 X 1.5 |
66.5 |
66.4 |
ユニファイねじ |
ねじの呼び |
推奨下穴径 |
最小下穴径 |
最大下穴径 |
No.0 – 80UNF |
1.25 |
1.19 |
1.3 |
No.1 – 64UNC |
1.5 |
1.43 |
1.57 |
No.1 – 72UNF |
1.55 |
1.48 |
1.61 |
No.2 – 56UNC |
1.79 |
1.7 |
1.87 |
No.2 – 64UNF |
1.84 |
1.76 |
1.91 |
No.3 – 48UNC |
2.05 |
1.95 |
2.14 |
No.3 – 56UNF |
2.11 |
2.03 |
2.19 |
No.4 – 40UNC |
2.27 |
2.16 |
2.38 |
No.4 – 48UNF |
2.37 |
2.28 |
2.45 |
No.5 – 40UNC |
2.59 |
2.49 |
2.69 |
No.5 – 44UNF |
2.65 |
2.56 |
2.74 |
No.6 – 32UNC |
2.77 |
2.65 |
2.89 |
No.6 – 40UNF |
2.92 |
2.82 |
3.02 |
No.8 – 32UNC |
3.42 |
3.31 |
3.53 |
No.8 – 36UNF |
3.51 |
3.41 |
3.6 |
No.10 – 24UNC |
3.81 |
3.69 |
3.93 |
No.10 – 32UNF |
4.07 |
3.97 |
4.16 |
No.12 – 24UNC |
4.47 |
4.35 |
4.59 |
No.12 – 28UNF |
4.61 |
4.5 |
4.72 |
1/4 – 20UNC |
5.12 |
4.98 |
5.25 |
1/4 – 28UNF |
5.47 |
5.36 |
5.58 |
5/16 – 18UNC |
6.57 |
6.41 |
6.73 |
5/16 – 24UNF |
6.91 |
6.79 |
7.03 |
3/8 – 16UNC |
7.98 |
7.8 |
8.15 |
3/8 – 24UNF |
8.51 |
8.39 |
8.63 |
7/16 – 14UNC |
9.35 |
9.15 |
9.55 |
7/16 – 20UNF |
9.38 |
9.73 |
10.03 |
1/2 – 13UNC |
10.81 |
10.6 |
11.02 |
1/2 – 20UNF |
11.47 |
11.33 |
11.6 |
9/16 – 12UNC |
12.2 |
12 |
12.4 |
9/16 – 18UNF |
12.9 |
12.8 |
13 |
5/8 – 11UNC |
13.6 |
13.4 |
13.8 |
5/8 – 18UNF |
14.5 |
14.4 |
14.6 |
3/4 – 10UNC |
16.6 |
16.4 |
16.8 |
3/4 – 16UNF |
17.5 |
17.4 |
17.6 |
7/8 – 9UNC |
19.5 |
19.2 |
19.7 |
7/8 – 14UNF |
20.5 |
20.3 |
20.6 |
1 – 8UNC |
22.3 |
22 |
22.4 |
1 – 12UNF |
23.4 |
23.2 |
23.5 |
1 1/8 – 8UNC |
25 |
24.7 |
25.3 |
1 1/8 – 12UNF |
26.5 |
26.3 |
26.7 |
1 1/4 – 7UNC |
28.2 |
27.9 |
28.5 |
1 1/4 – 12UNF |
29.7 |
29.5 |
29.9 |
1 3/8 – 6UNC |
30.8 |
30.4 |
31.1 |
1 3/8 – 12UNF |
32.9 |
32.7 |
33 |
1 1/2 – 6UNC |
33.9 |
33.6 |
34.2 |
1 1/2 – 12UNF |
36.1 |
35.9 |
36.2 |
1 3/4 – 5UNC |
39.4 |
39 |
39.8 |
2 – 4.5UNC |
45.1 |
44.7 |
45.5 |
2 1/4 – 4.5UNC |
51.5 |
51.1 |
51.9 |
2 1/2 – 4UNC |
57.1 |
56.7 |
57.5 |
2 3/4 – 4UNC |
63.5 |
63 |
63.9 |
3 – 4UNC |
69.8 |
69.4 |
70.2 |
3 1/4 – 4UNC |
76.2 |
75.7 |
76.6 |
3 1/2 – 4UNC |
82.5 |
82.1 |
82.9 |
3 3/4 – 4UNC |
88.9 |
88.4 |
89.3 |