Thanks for that guys and/or girls.
Spire nuts eh? Now I'm going to have to spend a couple of hours on google finding out why they're called that. Far too much free time...
A (hopefully) simple inquiry, but I'd REALLY appreciate advice.
Took the front casing off my CH boiler just to give it a general clean. It hasn't been tended to in a while, and two of the lugs (?) that the self-tapping fixing screws screw into have broken.
I'm trying to buy replacements...