On the look out for one Trolley Jack torsion Spring for my Kamsas trolley Jack. Mine snapped a while back. Cannot get a spare as the company no longer exists etc.etc.
I keep leaving it and then come to use the jack. GRRr
Internal diameter of spring has to clear the pin which is 15.55. Spring wire is 4mm thick. It is a big handle
Alternativly could some one measure the internal diameter of one of these:-