Thanks for that Jobloggs.
I'll see how it works out and as beermatt3 says I might as well replace the nut and screws.
It's not a two part siphon as JPC suggests.
Thanks again all.
I have 3inch square newel posts top and bottom of my stairs with two planks joining them. I want to replace them with a spindle staircase How would I fix the new newel posts. :?: