Thread Type

[Froudster]

Stupid question, but does anyone know what the thread type and size is on the "Screws" that hold GS1000 original indicator lenses in place.They're 30mm long and engineering thread rather than self tappers. Both were missing from one of the lenses and it was pure luck that it didn't fall off when I was riding it
I have tried metric and BA but nothing fits

If anyone knows or even has a couple that are surplus to requirements I'd be very greatful


Thanks chaps.

[psyguy]

they actually ARE self-tappers
i replaced mine with stainless steel screws (bought them at a store just by comparing the threads, cant remember the size now)
edit: i'm referring to the rectangular lenses indicators, not sure about the round ones, might be different

[Froudster]

Ah yes I forgot to mention that mine are the big round ones

[psyguy]

if you are sure that they have the engineers thread, they would be either M3 or (more likely) M4
but if the screws go into a PLASTIC housing, i bet they would be self-tappers

[Froudster]

They go into a chromed metal housing. M4 goes tight after about 3/4 turn so I reckon they might be M3. I'll have to get hold of one to try