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公制，英制，美制尺寸对照表 |
| 作者 : admin 发表日期 : 2011-1-7 9:53:56 |
以下资料由本司工程部提供，本司对各项数据已力求正确，但错误恐仍难免，各项数据仅供参考。
| 英制 |
公制（mm） |
美制牙UNC |
美制UNE细 |
直径 |
标准粗牙 |
细牙 |
新标 |
老标 |
| 0# |
1.52 |
|
80 |
M1.6 |
0.35 |
|
|
|
| 1# |
1.85 |
64 |
72 |
M2.0 |
0.4 |
|
|
|
| 2# |
2.18 |
56 |
64 |
M2.5 |
0.45 |
|
|
|
| 3# |
2.51 |
48 |
56 |
M3.0 |
0.5 |
0.35 |
|
|
| 4# |
2.84 |
40 |
48 |
M3.5 |
0.6 |
|
|
|
| 5#(1/8") |
3.18 |
40 |
44 |
M4.0 |
0.7 |
0.5 |
|
|
| 6# |
3.51 |
32 |
40 |
M5.0 |
0.8 |
0.5 |
|
|
| 8# |
4.17 |
32 |
36 |
M6.0 |
1.0 |
0.75 |
|
|
| 10#(3/16") |
4.83 |
24 |
32 |
M8.0
|
1.25 |
1.0 |
13 |
14 |
| 12#(7/32") |
5.49 |
24 |
28 |
M10 |
1.5 |
1.0 |
16 |
17 |
| 1/4" |
6.35 |
20 |
28 |
M12 |
1.75 |
1.25 |
18 |
19 |
| 5/16" |
7.94 |
18 |
24 |
M14 |
2.0 |
1.5 |
21 |
22 |
| 3/8" |
9.53 |
16 |
24 |
M16 |
2.0 |
1.5 |
|
|
| 7/16" |
11.11 |
14 |
20 |
M18 |
2.5 |
1.5 |
|
|
| 1/2" |
12.70 |
13 |
20 |
M20 |
2.5 |
1.5 |
|
|
| 9/16" |
14.29 |
12 |
18 |
M22 |
2.5 |
2.0 |
34 |
32 |
| 5/8" |
15.88 |
11 |
18 |
M24 |
3.0 |
2.0 |
|
|
| 11/16" |
17.46 |
|
|
M27 |
3.0 |
2.0 |
|
|
| 3/4" |
19.05 |
10 |
16 |
M30 |
3.5 |
2.0 |
|
|
| 13/16" |
20.64 |
|
|
M33 |
3.5 |
3.0 |
|
|
| 7/8" |
22.23 |
9 |
14 |
M36 |
4.0 |
3.0 |
|
|
| 15/16" |
23.81 |
|
|
M39 |
4.0 |
3.0 |
|
|
| 1" |
25.40 |
8 |
12 |
M42 |
4.5 |
|
|
|
| 1-1/8" |
28.58 |
7 |
12 |
M45 |
4.5 |
3.0 |
|
|
| 1-1/4" |
31.75 |
7 |
12 |
M48 |
5.0 |
3.0 |
|
|
| 1-3/8" |
34.93 |
6 |
12 |
M52 |
5.0 |
4.0 |
|
|
| 1-1/2" |
38.10 |
6 |
12 |
M56 |
5.5 |
4.0 |
|
|
|
|
|
扣环（挡 圈）