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外螺纹搓牙直径表
| 公制粗牙搓牙直径 |
美制搓牙直径 |
| 规 格 | 滚 造 径 | 规 格（UNC) | 滚 造 径 |
| M2.0×0.4 | 1.67-1.70 | 2#×56 | 1.84-1.86 |
| M2.3×0.4 | 1.97-2.00 | 3#×48 | 2.11-2.14 |
| M2.6×0.45 | 2.23-2.26 | 4#×40 | 2.36-2.40 |
| M3.0×0.5 | 2.60-2.63 | 5#（1/8）×40 | 2.69-2.72 |
| M3.5×0.6 | 3.03-3.06 | 6#×32 | 2.91-2.95 |
| M4.0×0.7 | 3.45-3.49 | 8#×32 | 3.57-3.60 |
| M4.5×0.75 | 3.92-3.96 | 10#（3/16）×24 | 4.05-4.09 |
| M5.0×0.8 | 4.38-4.43 | 12#（7/32）×24 | 4.70-4.75 |
| M6.0×1.0 | 5.25-5.30 | 1/4×20 | 5.45-5.50 |
| M7.0×1.0 | 6.25-6.30 | 5/16×18 | 6.93-6.98 |
| M8.0×1.25 | 7.07-7.12 | 3/18×16 | 8.40-8.45 |
| M9.0×1.25 | 8.07-8.12 | 7/16×14 | 9.83-9.89 |
| M10×1.5 | 8.91-8.97 | 1/2×13 | 11.32-11.39 |
| M11×1.5 | 9.91-9.97 | 9/16×12 | 12.80-12.87 |
| M12×1.75 | 10.73-10.79 | 5/8×11 | 14.26-14.33 |
| M14×2.0 | 12.56-12.63 | 3/4×10 | 17.27-17.34 |
| M16×2.0 | 14.56-14.63 | 7/8×9 | 20.26-20.34 |
| M18×2.5 | 16.23-16.31 | 1×8 | 23.20-23.28 |
| M20×2.5 | 18.23-18.31 | 1-1/8×7 | 26.07-26.16 |
| M22×2.5 | 20.23-20.31 | 1-1/4×7 | 29.24-29.33 |
| M24×3.0 | 21.90-21.98 | 1-3/8×6 | 32.02-32.12 |
| M27×3.0 | 23.89-24.98 | 1-1/2×6 | 35.08-35.29 |
| M30×3.5 | 27.56-27.66 | 1-3/4×5 | 40.85-41.08 |
| M33×3.5 | 30.56-30.65 | 2×4 1/2 | 47.00-4706 |
| M36×4.0 | 33.23-33.33 | | |
内螺纹攻牙孔径表
| 规格 |
最小孔径 |
最大孔径 |
（挤压丝攻）最小 |
（挤压丝攻）最大 |
| M2*0.4 |
1.57 |
1.67 |
1.77 |
1.83 |
| M2.5*0.45 |
2.01 |
2.14 |
2.25 |
2.31 |
| M3*0.5 |
2.46 |
2.6 |
2.72 |
2.79 |
| M4*0.7 |
3.24 |
3.42 |
3.6 |
3.69 |
| M5*0.8 |
4.13 |
4.33 |
4.55 |
4.65 |
| M6*1.0 |
4.92 |
5.15 |
5.43 |
5.55 |
| M8*1.25 |
6.65 |
6.91 |
7.29 |
7.42 |
| M10*1.5 |
8.38 |
8.68 |
9.15 |
9.3 |
| M12*1.75 |
10.11 |
10.44 |
11.01 |
11.19 |
| M14*2.0 |
11.84 |
12.21 |
– |
– |
| M16*2.0 |
13.84 |
14.21 |
– |
– |
螺纹直径与螺距表
| 公制螺纹 |
粗牙螺距P |
细牙螺纹 |
螺距p |
标准代号 |
直径(mm) |
UNC齿数 |
UNF齿数 |
BSW齿数 |
BSF齿数 |
| M1.6 |
0.35 |
M8 |
1 |
0# |
1.52 |
– |
80 |
– |
– |
| M2 |
0.4 |
M10 |
1 |
1# |
1.85 |
64 |
72 |
– |
– |
| M2.5 |
0.45 |
M10 |
1.25 |
2# |
2.18 |
56 |
64 |
– |
– |
| M3 |
0.5 |
M12 |
1.25 |
3# |
2.51 |
48 |
56 |
– |
– |
| M3.5 |
0.6 |
M12 |
1.5 |
4# |
2.84 |
40 |
48 |
– |
– |
| M4 |
0.7 |
M14 |
1.5 |
5#(1/8″) |
3.18 |
40 |
44 |
40 |
– |
| M5 |
0.8 |
M16 |
1.5 |
6# |
3.51 |
32 |
40 |
– |
– |
| M6 |
1.0 |
M18 |
1.5 |
8# |
4.17 |
32 |
36 |
– |
– |
| M8 |
1.25 |
M20 |
1.5 |
10#(3/16″) |
4.83 |
24 |
32 |
24 |
32 |
| M10 |
1.5 |
M20 |
2 |
12#(7/32″) |
5.49 |
24 |
28 |
– |
28 |
| M12 |
1.75 |
M22 |
2 |
1/4″ |
6.35 |
20 |
28 |
20 |
26 |
| M14 |
2 |
M24 |
2 |
5/16″ |
7.94 |
18 |
24 |
18 |
22 |
| M16 |
2 |
M27 |
2 |
3/8″ |
9.53 |
16 |
24 |
16 |
22 |
| M18 |
2.5 |
M30 |
2 |
7/16″ |
11.11 |
14 |
20 |
14 |
20 |
| M20 |
2.5 |
M33 |
3 |
1/2″ |
12.7 |
13 |
20 |
12 |
18 |
| M22 |
2.5 |
M36 |
3 |
9/16″ |
14.29 |
12 |
18 |
12 |
16 |
| M24 |
3 |
M39 |
3 |
5/8″ |
15.88 |
11 |
18 |
11 |
14 |
| M27 |
3 |
M45 |
3 |
11/16″ |
17.46 |
– |
– |
11 |
14 |
| M30 |
3.5 |
M52 |
4 |
3/4″ |
19.05 |
10 |
16 |
10 |
12 |
| M33 |
3.5 |
M56 |
4 |
13/16″ |
20.64 |
– |
– |
– |
– |
| M36 |
4 |
M60 |
4 |
7/8″ |
22.23 |
9 |
14 |
9 |
11 |
| M39 |
4 |
M64 |
4 |
15/16″ |
23.81 |
– |
– |
– |
– |
| M42 |
4.5 |
M72 |
6 |
1″ |
25.4 |
8 |
12 |
8 |
10 |
| M45 |
4.5 |
M76 |
6 |
1-1/8″ |
28.58 |
7 |
12 |
7 |
9 |
| M48 |
5 |
M80 |
6 |
1-1/4″ |
31.75 |
7 |
12 |
7 |
9 |
| M52 |
5 |
M85 |
6 |
1-3/8″ |
34.93 |
6 |
12 |
– |
8 |
| M56 |
5.5 |
M90 |
6 |
1-1/2″ |
38.1 |
6 |
12 |
6 |
8 |
