Why don't drives come with the screw

need help: screw is too short when I added the SSD Heatsink on m 2 slot screw I'm looking at installing an NVMe into the bottom of this: m2 pcie slot Replacement Mounting Screw for M2 Size SSD's Guaranteed fit for slot Perfect for when you lost your motherboard or adapter's screw

m2 expansion slot 5x5mm It is crucial to choose screws that match the specific dimensions of your SSD and the mounting holes on your motherboard Using incorrect sizes