Navigation: Home page.    
Logo: Green MWE cogs.    

Screw sizes


Imperial and metric equivalents

Just when I had more or less come to remember what size wood screw I should buy for a particular task somebody decided that henceforth screws would be referred to by entirely metric dimensions.

Screw diameters Screw lengths
3 mm
3.5 mm
4 mm
5 mm
5.5 mm
6 mm
¼ inch
6 mm
½ inch
12 or 13 mm
  16 mm
¾ inch
about 20 mm
1 inch
25 mm
1¼ inch
30 mm
1½ inch
35 mm
  40 mm
1¾ inch
2 inch
50 mm
3 inch
76 mm

Disclaimer (the small print):  The information within this page and within this web site is offered merely in the hope that somebody somewhere might find something of it that is useful in some matter.  It is not guaranteed to be accurate or reliable in any way and you rely upon it entirely at your own risk.

Site locator: mwenterprisesdotcodotuk   W3C HTML validator    W3C CSS validator