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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 | | |
| | | | |
单位（mm)螺纹直径与螺距表
| 螺纹、直径与螺距或牙数对照表 |
| 公制螺纹 |
标准代号 |
美制 |
英制 |
| 粗牙螺纹 |
细牙螺纹 |
规格 |
直径（MM) |
牙数 |
牙数 |
| 规格 |
螺距P |
规格 |
螺距p |
UNC |
UNF |
BSW |
BSF |
| 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 |
|
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