Hi All,
I have been looking for the description of the "universal" thread on a chimney/drain rod?
I guess it's about 18mm diameter with a 3 mm pitch, but would like to know exactly. I know it not standard metric whitworth UNF etc. Does anyone know where I may get a tap+die for this thread?
I have a mortar problem in a chinmey and have a "hammer" but need to thread it for the rods.
I've look everywhere without success.
Regards
Steve