M5 Pre assembly, Post Assembly, and Post Assembly with Spring Tee Nuts.
Fit most standard T-slot profiles including Generic Tslot, Vslot and Makerslide.
We generally advise using the cheaper pre assembly nuts, but keeping a few post assembly nuts on hand to help when you don't want to disassemble the project to slide in one more pre assembly nut!!
When you need the nut to stay in place during difficult assembly, choose the 'Post Assembly with Spring ' nut.