Sterling SUB 4 2005: Saddle adjustment grub screws

Sterling SUB 4 2005: Saddle adjustment grub screws

Hello – I’m UK based.

Would anyone know the correct sized screws for these? I’ve ordered two sets now both of which don’t fit:

(M3, 100mm) the thread was too fine

(4-40, 3/8ths) too slim

I’ve since learned the difference between UNC and UNF, and I believe I require UNC.

I’ve tried asking string and things and a few others and had no reply.
I looked at ordering a set of new saddles from from EB but they’re exclusive to US.

Please help!

Thank you, Martin.

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