Run a tap through the blind nut before you try to
use a screw. If there is any epoxy in the threads
it will jam the screw but the tap will clean it out.

If it doesn't take, drill the wood to fit a dowel the
same size or slightly bigger than the blind nut.

Drill a hole in the dowel to fit the blind nut.

Glue the blind nut to the dowel,

then glue the dowel with the blind nut
into the hole in the airframe.

Finally cut off and sand any extra
dowel sticking out.

Jenny