I used these to cap off the threaded inserts that I installed to my butcher blocks to hang/mount things off of the side of them. 

These are the threaded inserts I used:  https://a.co/d/2WHU29a   They are M6x1.0 threads.  So this should work with any M6x1.0 threads I would assume.  

Print these at .12 layer height if possible.  The lower the layer height, the easier for the threads to be made.