Vintage Original Singer Featherweight Case Clasp for the 221K7 White Featherweight cases.
Drill out the rivets or unscrew the screws that are still on your case and replace with this original vintage part using the new mini screws and nuts included. (Because removing the original brads compromises the integrity of the original wood, we do not recommend replacing with brads again.) The nuts on the backside of the screws will suck into the wood but whatever is left of the screw beyond the nut will need cut off (hack saw, dremel, etc.). Sometimes you can peel back the fabric that is on the interior of the case and reglue it, otherwise you can glue a piece of fabric back over the nuts to protect the machine.
There are a few different variations of the latches for the White Featherweight cases. Be sure to match your case to the variant you are ordering.