Lost your Clock Component Hex Socket nut, like I did? Print this one in place. Do make sure to print in the finest setting your printer allows so the small threads match.

Here's the source if you need to make change.s https://cad.onshape.com/documents/31faf0d00911212677dbe10a/w/0ef27ecdc20fb3980668c5b9/e/f48569d0b525b53437f164e3?renderMode=0&uiState=6740bdd8409bd10a5cc4b325