Im certain This was already answered in your first post
Thread size is 1/2 BSF 16. The Hex/Spanner size is irrelevant...
But we should maybe note, that the hex size of the OEM Victa nut is NOT the British Standard size for that thread! It's larger. Ref: 'Machinery's Handbook', 23rd edn.
Cheers, Gadge
"ODK Mods can explain it to you, but they can't understand it for you..."
"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."
