What are those metal parts underneath a mattress base what you screw the furniture legs in to?
Last i checked those were called Bed frames, but the name varries from area to area. if you go to a firnature store and tell them you need a bed frame (or bed frame rails if you litterelly jsut need the metal parts) they should know what you’re talking about regardless, but i don’t know if a hardware store will carry them, but it’s worth a shot.
