Christy,
The Kenmore and the 301 are both side loading vertical bobbin systems, but the parts do not interchange. The Kenmore uses standard Class 15 bobbins and related parts. The Singer 301 uses the same skinny bobbin and case as the Featherweight.
The parts are:
Bobbin
Bobbin case - little case the bobbin sets in
Shuttle or Bobbin hook - half moon looking thing that rotates back and forth with a sharp point on it.
Shuttle race cover- Round thing that holds the Shuttle in
This info is covered in the manual .
What's wrong with that machine that your parting it out? Just curious.
Joe