Anyone know the Specification of the Accelerator pump screws?

[jedwards]

Firstly, thanks to the help of this group, I have resolved the issue I was having with the Accelerator Pump activation on my 32PBI-2 carburettor. However, now it leaks fuel because I'be damaged the head of 4 of the 6 screws, and now I cannot get enough force onto the screw's slot to seal up the pump properly.
I have WA Fasteners no that far from work, and I bet if I can give then the spec of the screws, they can sell me replacements.
Diameter and Length I can measure at home tonight, but does anyone know what thread specification is for these screws? Cannot find anything on-line.

Many thanks
Jeff

[B.S.F.]

Possibly this
System Francaise system of screw threads (https://www.sizes.com/tools/thread_sf.htm)
There have been endless discussions about these threads, without, as far as I know, a conclusion having been reached.
.W.

[p38arover]

I’d suspect BA threads.

If you were nearby, we could check, I have a range of BA screws and taps.

[1950landy]

184615 Is it screws No 33 that you are after , I may have some will check in morning, you can have them if I have them.

[1950landy]

Checked it out & have given away all the S1 carbys including the ones that had parts missing . Sorry.