Screw Size Conversion Chart
Handy chart for converting metric screw sizes to imperial.
Metric Size mm Approx. Inch Equivalent.
3.0 x 12 4 x 1/2
3.0 x 20 4 x 3/4
3.0 x 25 4 x 1
3.5 x 12 6 x 1/2
3.5 x 16 6 x 5/8
3.5 x 20 6 x 3/4
3.5 x 25 6 x 1
3.5 x 30 6 x 1 1/4
4.0 x 20 8 x 3/4
4.0 x 25 8 x 1
4.0 x 30 8 x 1 1/4
4.0 x 40 8 x 1 1/2
4.0 x 45 8 x 1 3/4
4.0 x 50 8 x 2
4.0 x 60 8 x 2 1/2
4.0 x 70 8 x 2 3/4
5.0 x 30 10 x 1 1/4
5.0 x 40 10 x 1 1/2
5.0 x 50 10 x 2
5.0 x 60 10 x 2 1/2
5.0 x 70 10 x 2 3/4
5.0 x 80 10 x 3
5.0 x 90 10 x 3 1/2
5.0 x 100 10 x 4
6.0 x 50 12 x 2
6.0 x 60 12 x 2 1/2
6.0 x 70 12 x 2 3/4
6.0 x 80 12 x 3
6.0 x 90 12 x 3 1/2
6.0 x 100 12 x 4