Basic Thread Charts

Metric Thread Chart

Imperial Thread Chart

 Thread Size
M1
M1.2
M1.4
M1.6
M1.7
M1.8
M2
M2.2
M2.3
M2.5
M2.6
M3
M3.5
M4
M5
M6
M7
M8

M10

M12
M14
M16
M18
M20
M22
M24
M27
M30
M33
M36
M39
M42
M45
M48
M52
M56
M60
M64
M68
M72
M80
M90
M100
 Coarse Pitch
0.25
0.25
0.3
0.35
0.35
0.35
0.4
0.45
0.4
0.45
0.45
0.5
0.6
0.7
0.8
1
1
1.25

1.5

1.75
2
2
2.5
2.5
2.5
3
3
3.5
3.5
4
4
4.5
4.5
5
5
5.5
5.5
6
6
6
6
6
6
 
 Metric Fine

















0.75

1

1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
3
 
 Extra Fine



















0.75


1.25
1.25
1
1
1
1
1
1
1.5
1.5
1.5
1.5
2
2
2
2
2
2
2
2
2
2
2
2
 Diameter In Inches
#1
#2
#3
#4
#5
#6
#8
#10
#12
1⁄4
5⁄16
3⁄8
7⁄16
1⁄2
9⁄16
5⁄8
3⁄4
7⁄8
1
1 1/8
1 1/4
1 1/2


UNC
64
56
48
40
40
32
32
24
24
20
18
16
14
13
12
11
10
9
8
7
7
6
BSW
64
56
48
40
40
32
32
24
24
20
18
16
14
12
12
11
10
9
8
7
7
6
UNF
 72
64
56
48
44
40
36
32
28
28
24
24
20
20
18
18
16
14
12
12
12
​12
 
BSF
 
 





32

28
26
22
20
18
16

16
14
12
11
10
9
9
​8


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