Broken caliper bolt

So I'm trying to be a good truck owner getting ready to POR15 the undercarriage when I get under I noticed my rotors were only worn in one spot leaving the rest rusted and not used , no big deal new pads and rotors. Driver side went fine but passenger side I broke a caliper bolt . Drilled this out and got a new bolt to work but I know it's not a perm fix cause I can't tighten it as for it will strip , any suggestions ? What needs to be replaced ? I'm new here so any help is appreciated

 

Anyone ? What would i need to replace where the caliper mounts ? So I can ask around

 

helicoil, drill it out, tap it, install helicoil

 

x2 on helicoil,
buy the kit..available at most auto parts stores, Amazon and McMaster
Verifiy the correct thread you will need, I don't recall off hand what that size is.

 

Thanks guys , and if I wanted to replace the whole thing what's the part called ?

 

The knuckle