That would be solder that's less that 0.5 mm thick. Not much strength there--and probably pretty difficult to get into a PGA socket hole. Better to tin a bit of 28 AWG copper wire, solder, then bend. Again, not much strength. size 7 bronze music wire has the requisite strength and stiffness. A no. 77 wire drill would make for a close fit. I used a no. 70 wire drill and size 11 bronze music wire because that's what I had on hand--it fit the socket snugly, but it fit.
It works perfectly fine with ZIF sockets (I am actually typing this a machine that has a CPU that I repaired in such a way