what do i call this part for my wheels on my 1978 dodge truck?

[tigermusicgirl_08]

my the stubs where my lug nuts go on my front passenger side are broke i only have two on there in tact and i need a new one of those pieces but i don't know what its called to even look it up so does anyone know what part im talking about and what it is called
thanks

 

[jesta.drifter]

Lug nut studs or wheel studs. Usually you beat them out through the back with a hammer and then use a lug nut and washers to instal new ones