The person who supplied your assembly used "Toolbox" on a Local computer.
For some stupid reason, SW has ignored this common failing of the toolbox/smart fastener add-on. What it means are; the parameters that set the size of the screw are on the local computer which the drawing was created. Unless there is a way to get to those settings, you won't have the file open with the correct size hardware.
If you work on a network, you can have the Toolbox setup on a common drive where all the users can access it, then the path is set back to that common location, and the parts come out ok. If you send the assembly to someone outside the local net, then it becomes "The Big Screw" again.
If you have a list of the correct sizes, it might be best if you open the files for the oversize hardware, and edit it to the correct size. If you edit it, it will then be loaded as a regular part in the assembly, and not as one of the stupid "smart Fasteners".
Otherwise, unless you really need the hardware, just delete it.
