Eureka 6975 World-Vac Cord ...
$9.99
Product details
The cord inlet for the Eureka 6975 World-Vac, part 276901, also listed for the Eureka 54999. It is the fitting that anchors the power cord where it enters the housing so the wire is not flexing against bare plastic.
You can usually tell a failed one by feel before you can see it, because the cord moves at the entry point where it used to be held solid. Once the inlet has cracked or lost its grip, the insulation rubs on a hard edge every time the machine is pulled around, and the fault that follows is intermittent: the vacuum drops out mid-room, then runs again when the cord shifts.
That is a repair worth doing promptly rather than living with. Unplug the machine, fit the new inlet in the original opening, and look over the length of cord nearest the body for chafing while you are there.

