It does look a bit rough, and I can't see the 2BA thread either, though it could just be the camera angle. Check the FT203 thread, it should be 20t.p.i., or if you haven't got a thread gauge compare it with the standard bolt on t'other side of the machine before screwing it in anywhere. The little 2BA screw looks the right length.
Thanks for the reply.
Yes, not sure how, but the thread has completley gone.
Need new one. Could've included it in the last order but didn't realize.