What screw? Dull man’s club post.

[Milzy]

I’d like to replace this rusty screw with a better one. Any ideas on what size, thinking Bolt spec: M5x 8mm. I want high quality stainless or titanium, no more rust.

 

[PapaZita]

Nice looking frame! 😁. Pretty sure they‘re all M5. 8mm seems about the right length. A stainless button head will be nice and aero. Cap head easier to get off if somehow it does ever get stuck in there. Maybe look for a security torx if you want to confound the bike shop mechanic (or the future you).

 

[mickle]

Tres importante the replacement is not longer than the original and interfere with the bottom bracket.

 

[Marchrider]

do you think that will be a 'machine screw' or a self tapper - I don't think you will know until you remove it

i doubt ts been manufactured like that, it could have started out with a proper stainless fastener, been dismantled, then lost and then wedged a general self tapper in the hole

 

[PapaZita]

The frame will be tapped for an M5 machine screw.