Originally Posted by
PlaxMacaws
Yes, one can always use toothpicks or cardboard, or any number of things to fill the extra space in order to give the threads something to bite into. But since wood screws of a given thread size come in various lengths, finding one that's larger in diameter than the previously used screw, while still at a similar length, should be possible. For perches, I typically use threaded studs that have wood screw threads on one end and machine threads on the other, and then use wingnuts to secure them. And I use those resin spacers if the studs happen to be a bit too long.