Slot Drills 2 flute Metric Sizes

RDX 7Pcs Magnetic Nut Driver Set 8mm Socket Adapter Hex Drill Bit 8mm slot drill 8mm, I want them to have a flat bottom and I was thinking of using a slot drill in my mill to do the job so that accuracy would be assured On googling for 8mm t slot nuts Has anyone had luck making a slot in a commercial PCB by getting them to drill closely drilled holes 8mm or so for the tabs of barrel jack

agen slot online terbaik I have bought top quality Sutton but at $35-$45 each they are a bit pricey Just looking for between 3mm and 8mm Plain or threaded