Due to doing some DIY when I was tired, I managed to drop the vent for a radiator between the floorboards. I've looked for it and can't find it there, so have purchased a new vent. I thought it should be a straightforward 1/2" vent/plug, but the thread seems to be different on the radiator to the thread plug.
Am I going mad, or are there different threads for radiator plug? If so, where do they sell those and what should I be asking for?
Thanks