What size T-slot nutsbolts do I want to get for the 20x20 Aluminum

m6 slot nut   Dan m6 t slot nut

T-Slot Nuts · Hammerhead Nut 8 M6, bright zinc-plated · Automatic T-Slot Nut V 8 St M6, stainless · T-Slot Nut 8 St M6, heavy-duty, bright zinc-plated · T-Slot Nut

M6 30 Series Metal T-slot Nut Sliding Block Slot Nuts Silver Tone 10pcs  slot nuts became cheaper and more affordable and maybe that's why I can't find these

$1 wheel of fortune slot machine Products Nuts and Screws T-Slot Nuts T-slot Nut M6 with Spring Metal T-slot Nut M6 with Spring Metal 0,53 € alv 0% Product code Choose from our selection of M6 T slots in a wide range of styles and sizes In stock and ready to ship