Stem bolts

[adeshere]

Before i try and work it out, anyone one know what type of allen key bolts are used on stems ?

I'm guessing they are common size

[skyway67]

usually m8

they vary in tensile strength thats the numbers on the top ie 8.8 12.9 etc

[steve69]

If it's an American made stem it's more likely gonna be imperial,

5/16" springs to mind but would need to check (i have some if needed)