Design goesZen

Samsung is notoriously known for selling their SSD 980 NVMe M.2 SSDs without the appropriate screw to lock it in place on the motherboard. Same for the Samsung SSD 970, 970 evo, 970 pro, 960, 960 evo, 950, ...

When you place your order on one of those fast SSD sticks, you might think "ah, it'll fit and sit in the slot without the screw okay..." Well, it won't!
The thing is that the NVMe stick is inserted into the M.2 socket by sliding it in and then pressing it down to build up a spring force against the contacts. And this force will have the memory stick lift itself up again without the screw. So you have to get one, either separately or it is bundled with your motherboard already.

The correct samsung nvme screw is a tiny 2 by 3 millimeter CM2x3-3.3. Sometimes referred to as M2 x 3 (mm). It depends on your MoBo if you need a spacer post or not below the SSDs PCB.
The screw you can get off eBay or Amazon as well, just search for these keywords. It's a common screw in laptops and their wifi cards etc. Might be you already have one of those somewhere. Or a similar one.

If you think this was helpful, use this link when you go shopping at amazon.