Metric to Imperial Screw Size Conversion
The following chart will enable you to convert between Metric and Imperial screw sizes.
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|
Metric to
Imperial Conversion Chart
|
|
Diameter
mm
|
Length
mm
|
Imperial
Size
|
Diameter
mm
|
Length
mm
|
Imperial
Size
|
|
3
|
12
|
4x1/2
|
3.5
|
12
|
6x1/2
|
|
16
|
4x5/8
|
16
|
6x5/8
|
|
20
|
4x3/4
|
20
|
6x3/4
|
|
25
|
4x1
|
25
|
6x1
|
|
30
|
4x1 1/4
|
30
|
6x1 1/4
|
|
40
|
4x1 1/2
|
40
|
6x1 1/2
|
|
4
|
12
|
8x1/2
|
4.5
|
25
|
9x1
|
|
16
|
8x5/8
|
30
|
9x1 1/4
|
|
20
|
8x3/4
|
35
|
9x1 3/8
|
|
25
|
8x1
|
40
|
9x1 1/2
|
|
30
|
8x1 1/4
|
45
|
9x1 3/4
|
|
35
|
8x1 3/8
|
50
|
9x2
|
|
40
|
8x1 1/2
|
60
|
9x2 3/8
|
|
45
|
8x1 3/4
|
70
|
9x2 3/4
|
|
50
|
8x2
|
75
|
9x3
|
|
60
|
8x2 3/8
|
|
70
|
8x2 3/4
|
|
5
|
25
|
10x1
|
6
|
30
|
12x1 1/4
|
|
30
|
10x1 1/4
|
40
|
12x1 1/2
|
|
35
|
10x1 3/8
|
50
|
12x2
|
|
40
|
10x1 1/2
|
60
|
12x2 3/8
|
|
45
|
10x1 3/4
|
70
|
12x2 3/4
|
|
50
|
10x2
|
75
|
12x3
|
|
60
|
10x2 3/8
|
80
|
12x3 1/4
|
|
70
|
10x2 3/4
|
90
|
12x3 1/2
|
|
75
|
10x3
|
100
|
12x4
|
|
80
|
10x3 1/4
|
110
|
12x4 3/8
|
|
90
|
10x3 1/2
|
130
|
12x5 1/8
|
|
100
|
10x4
|
150
|
12x6
|
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