A lot depends on the mechanical connection. You can use acid core tin-lead solder or silver solder. Electrical connections use resin cored solder mostly tin-lead, but some of the newer lead free solder use 245 resin in it.
ORIGINAL: TimothyM
OK solder experts, what is the best type of solder to use for a mechanical (non current carrying) application such as solder clevises or tail bracing wires? Also, I would like to know what is the best for electrical connections such as batteries, bannana plugs, etc.. Any info or tips on soldering are needed and welcome.