Screw sizes

[FilthyMcNastys]

I'm had some fischer screws a while back and wanted some more, but not to sure of the size or how to work it out.

any idea what size screws the picture below is?

Thanks

 

[Monkeh]

Bog standard 4x50 like any other.

 

[FilthyMcNastys]

How do screw sizes work? whats the 2 sizes? example, 4.0 x 50mm?

 

[JimLoskot]

also can be in inches ie 8x2"

 

[StephenW]

Using 4 x 50 as the example, the 4 is the diameter of the shank just below the head in mm and the 50 is the length of the shank in mm not including the head.

 

[Maxsys]

If you still work in old money have a look here http://www.thesitebox.com/Page/21/Metric-to-Imperial-Screw-Size-Conversion.aspx