Topic: Screw size for signal light lenses

[b1jackson]

Does anyone know the metric size/pitch for those tiny fine threaded screws that hold signal lenses on many of the SOHC Honda?  They are always rusty and/or stripped so I'm hoping to just do a bulk buy of some small stainless ones and always have a drawer full instead of scrounging my parts hoard.

I know DSS has them but they don't list the size/pitch. 

[69cb750]

What year and model ?
Signals changed through years.

[b1jackson]

In particular any of the smaller lenses. So pre 77/78 models for the most part on 550 or 750.  I think the larger lenses take a bigger screw.

[newday777]

1974 and earlier is #26
3×25

[b1jackson]

1974 and earlier is #26
3×25

That is considered M3?

[Oddjob]

Yes, M3 is the same as 3 x 25, so M3 x 25mm. Don't forget they are countersunk, raised countersunk to be exact. I replace all mine with stainless so they don't rust in the cross in the head and strip just when you go to remove them.

[b1jackson]

Great. Thanks!

[Oddjob]

Don’t forget a little grease on the threads when installing, especially if you’re going the stainless route.

[b1jackson]

Always. I just have to find some with the head small enough

[spotty]

and if you want some stress in your life, get some aftermarket indicators that have those $hitty self tapper screws in them, then try and tap the plastic bodies to take an M4 thread

[b1jackson]

Haha.  Nope. I’ve got overflowing milk crates of signals in stock. That aftermarket stuff looks way too shiny for me.