- ZHUHAI JIALI HARDWARE CO.,LTD.
- 0760-85889089
The Metric & American Standard thread table
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Metric Standard trhead
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American Standard thread
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||||||||
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Dia
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Pitch mm
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Dia
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dia
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Pitch＝thread/inch
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|||||
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mm
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UNC
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UNF
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Tapping
|
＜ 1/4"
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Inch in
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Metric mm
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UNC
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UNF
|
Tapping
|
|
M1
|
0.25
|
0.2
|
72T
|
0#
|
0.06
|
1.524
|
-
|
80
|
|
|
M1.2
|
0.25
|
0.2
|
56T
|
1#
|
0.073
|
1.854
|
64
|
72
|
|
|
M1.6
|
0.35
|
0.2
|
48T
|
2#
|
0.086
|
2.184
|
56
|
64
|
32T
|
|
M2
|
0.4
|
0.25
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40T
|
3#
|
0.099
|
2.515
|
48
|
56
|
|
|
M2.5
|
0.45
|
0.35
|
28T
|
4#
|
0.112
|
2.845
|
40
|
48
|
24T
|
|
M3
|
0.5
|
0.35
|
24T
|
5#
|
0.125
|
3.175
|
40
|
44
|
|
|
M4
|
0.7
|
0.5
|
19T
|
6#
|
0.138
|
3.505
|
32
|
40
|
20T
|
|
M5
|
0.8
|
0.5
|
16T
|
8#
|
0.164
|
4.166
|
32
|
36
|
18T
|
|
M6
|
1
|
0.75
|
14T
|
10#
|
0.19
|
4.826
|
24
|
32
|
16T
|
|
M8
|
1.25
|
1
|
12T
|
12#
|
0.216
|
5.486
|
24
|
28
|
14T
|
|
M10
|
1.5
|
1.25
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|
1/4"
|
0.25
|
6.350
|
20
|
28
|
14T
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|
M12
|
1.75
|
1.25
|
|
5/16"
|
0.3125
|
7.938
|
18
|
24
|
12T
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|
M14
|
2
|
1.5
|
|
3/8"
|
0.375
|
9.525
|
16
|
24
|
|
|
M16
|
2
|
1.5
|
|
7/16"
|
0.4375
|
11.113
|
14
|
20
|
|
|
M18
|
2.5
|
1.5
|
|
1/2"
|
0.5
|
12.700
|
13
|
20
|
|
|
M20
|
2.5
|
1.5
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9/16"
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0.5625
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14.288
|
12
|
18
|
|
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M22
|
2.5
|
1.5
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5/8"
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0.625
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15.875
|
11
|
18
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|
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M24
|
3
|
2
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3/4"
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0.75
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19.050
|
10
|
16
|
|
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M27
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3
|
2
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7/8"
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0.875
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22.225
|
9
|
14
|
|
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M30
|
3.5
|
2
|
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1"
|
1
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25.400
|
8
|
12
|
|
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(M33)
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3.5
|
2
|
|
1-1/8"
|
1.125
|
28.575
|
7
|
12
|
|
|
M36
|
4
|
3
|
|
1-1/4"
|
1.25
|
31.750
|
7
|
12
|
|
|
(M39)
|
4
|
3
|
|
1-3/8"
|
1.375
|
34.925
|
6
|
12
|
|
|
M42
|
4.5
|
3
|
|
1-1/2"
|
1.5
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38.100
|
6
|
12
|
|
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(M45)
|
4.5
|
3
|
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1-3/4"
|
1.75
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44.450
|
5
|
-
|
|
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M48
|
5
|
3
|
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2"
|
2
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50.800
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4.5
|
-
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注：标准牙为粗牙