We have a kitchen tap which was held in place in the draining board with two threaded rods. One end of each rod went into the tap base, the other had a nut on which was screwed up against a plate to spread the load across the underside of the draining board.
The tap now needs to be mounted on a 30mm quartz worktop and the screwed rods are too short so I need to find longer ones. They are ~6mm in diameter but I don't know what to look for in terms of thread size. Is there a standard 'kitchen-tap-threaded-rod'?