Replacing the fuel line today, the brass spigot connecting the Raptor to the carb pulled out when I pulled off the line. Tapped it back into place with some Permatex fuel-safe goo, I'll see tomorrow if it holds or leaks. No evidence of any soldering/glue on the original part.
Yes! genuine yamaha part!  
Was this a fluke?

looks like the Permatex is holding.  Same stuff I used on the Raptor gasket when I installed.
If I get a failure, I'll try the threadlocker.
Cheers!
ps; I'm using black fuel line this time. Can't see if the float valve is holding, or leaking past the valve. That's why I prefer the clear stuff.