|
metric standard trhead
|
american standard thread
|
||||||||
|
dia
|
pitch mm
|
dia
|
dia
|
pitch＝thread/inch
|
|||||
|
mm
|
unc
|
unf
|
tapping
|
＜ 1/4"
|
inch in
|
metric mm
|
unc
|
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
|
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
|
|
1/4"
|
0.25
|
6.350
|
20
|
28
|
14t
|
|
m12
|
1.75
|
1.25
|
|
5/16"
|
0.3125
|
7.938
|
18
|
24
|
12t
|
|
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
|
|
9/16"
|
0.5625
|
14.288
|
12
|
18
|
|
|
m22
|
2.5
|
1.5
|
|
5/8"
|
0.625
|
15.875
|
11
|
18
|
|
|
m24
|
3
|
2
|
|
3/4"
|
0.75
|
19.050
|
10
|
16
|
|
|
m27
|
3
|
2
|
|
7/8"
|
0.875
|
22.225
|
9
|
14
|
|
|
m30
|
3.5
|
2
|
|
1"
|
1
|
25.400
|
8
|
12
|
|
|
(m33)
|
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
|
38.100
|
6
|
12
|
|
|
(m45)
|
4.5
|
3
|
|
1-3/4"
|
1.75
|
44.450
|
5
|
-
|
|
|
m48
|
5
|
3
|
|
2"
|
2
|
50.800
|
4.5
|
-
|
|
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