I replaced my original propane tank rods on both trailers with ½" x 13 thread 36" long 304 stainless steel rods that won't rust. Also used stainless nuts and washers doing the replacement process. Got them from Grainger supply.
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Tuson TPMS, disc brakes, 16" tires & wheels