Why doesn't this fit my 1/2" backnut?
Hi, bought a 2pack of brass 1/2" basin backnuts and this to tighten them. It doesn't fit? It's too big? Have I bought the wrong size nut or is the spanner faulty?
I have come across this too. It appears brass backnuts have imperial A/F dimensions of 1 inch for 1/2 inch BSP backnuts and 1 1/4 inch for 3/4 inch BSP backnuts. It appears that plastic backnuts are metric 27mm and 32 mm respectively. Therefore this box spanner is for plastic backnuts although you can get away with the 32mm end for 1 1/14 inch since they are practically the same. Unfortunately the 27mm end will slip round on a 1 inch backnut.
Date published: 2017-03-13