Metric to Imperial Screw Size Conversion
The following chart will enable you to convert between Metric and Imperial screw sizes.
THESITEBOX.COM stocks a wide range of Screws and fixings. This chart is of particular use with our Wood Screws and Self Tapping Screws.
Take me back to the Wood Screws, Self Tapping Screws or to the general Screws category.
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Metric/Imperial
Conversion Chart
|
|
Gauge
mm
|
Length
mm
|
Imperial
Size
|
Gauge
mm
|
Length
mm
|
Imperial
Size
|
|
3
|
12
|
4 x 1/2
|
3.5
|
12
|
6 x 1/2
|
|
16
|
4 x 5/8
|
16
|
6 x 5/8
|
|
20
|
4 x 3/4
|
20
|
6 x 3/4
|
|
25
|
4 x 1
|
25
|
6 x 1
|
|
30
|
4 x 1 1/4
|
30
|
6 x 1 1/4
|
|
40
|
4 x 1 1/2
|
40
|
6 x 1 1/2
|
|
4
|
12
|
8 x 1/2
|
4.5
|
25
|
9 x 1
|
|
16
|
8 x 5/8
|
30
|
9 x 1 1/4
|
|
20
|
8 x 3/4
|
35
|
9 x 1 3/8
|
|
25
|
8 x 1
|
40
|
9 x 1 1/2
|
|
30
|
8 x 1 1/4
|
45
|
9 x 1 3/4
|
|
35
|
8 x 1 3/8
|
50
|
9 x 2
|
|
40
|
8 x 1 1/2
|
60
|
9 x 2 3/8
|
|
45
|
8 x 1 3/4
|
70
|
9 x 2 3/4
|
|
50
|
8 x 2
|
75
|
9 x 3
|
|
60
|
8 x 2 3/8
|
|
70
|
8 x 2 3/4
|
|
5
|
25
|
10 x 1
|
5.5
|
30
|
12 x 1 1/4
|
|
30
|
10 x 1 1/4
|
40
|
12 x 1 1/2
|
|
35
|
10 x 1 3/8
|
50
|
12 x 2
|
|
40
|
10 x 1 1/2
|
60
|
12 x 2 3/8
|
|
45
|
10 x 1 3/4
|
70
|
12 x 2 3/4
|
|
50
|
10 x 2
|
75
|
12 x 3
|
|
60
|
10 x 2 3/8
|
80
|
12 x 3 1/4
|
|
70
|
10 x 2 3/4
|
90
|
12 x 3 1/2
|
|
75
|
10 x 3
|
100
|
12 x 4
|
|
80
|
10 x 3 1/4
|
110
|
12 x 4 3/8
|
|
90
|
10 x 3 1/2
|
130
|
12 x 5 1/8
|
|
100
|
10 x 4
|
150
|
12 x 6
|
|
6
|
25
|
14 x 1
|
|
|
|
|
|
30
|
14 x 1 1/4
|
|
|
|
|
|
35
|
14 x 1 3/8
|
|
|
|
|
|
40
|
14 x 1 1/2
|
|
|
|
|
|
45
|
14 x 1 3/4
|
|
|
|
|
|
50
|
14 x 2
|
|
|
|
|
|
60
|
14 x 2 3/8
|
|
|
|
|
|
70
|
14 x 2 3/4
|
|
|
|
|
|
75
|
14 x 3
|
|
|
|
|
|
80
|
14 x 3 1/4
|
|
|
|
|
|
90
|
14 x 3 1/2
|
|
|
|
|
|
100
|
14 x 4
|
|
|
|
Take me back to the Wood Screws, Self Tapping Screws or to the general Screws category.
