This is what you need. My Asus Tuf B350 didn't have a gap, and while you can screw in an M.2 drive without it, it's bent, not perfect, and will likely run hotter since the air gap to the motherboard is as small as intended. There are many things in this kit that you won't need for this build, but keep them for others as these are very specific parts and not easy to find locally, especially here.
36-Pack Black Rubber PC CPU/Case Fan Screws/Rivets Set for Computer
11 Review
uxcell 3.5" HDD Screw Black 200pcs for Computer PC Case - Flat Phillips Head - 6#-32 - Hard Drive Fasteners
10 Review
MacBook Retina 13-inch (A1425, A1502) and π© 15-inch (A1398) Bottom Case Screw Set with Pentalobe Screwdriver
11 Review
π§ Premium Repair Replacement Screws & Tools for MacBook Pro Retina 15"/13" - Complete Bottom Case Set
10 Review
ZOTAC ZBOX-CI325NANO-U Series Nano Fan-Less Mini PC Intel N3160 Quad-Core CPU Silent Performance Barebone System SSD & RAM Not Included, No OS
12 Review
π¦ Smraza Raspberry Pi 4 Model B Case with Fan, Acrylic Enclosure, 4 Coolers, 5V 3A USB-C Power Adapter, USB Card Reader, 6ft Micro HDMI Cable, and 7.8in Micro HDMI to HDMI Adapter Cable for 4K Ultra HD
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Complete Kuman Raspberry Pi 4B 3B+ Kit: Breadboard, Expansion Board, Jumper Cables, Ribbon Cable, Resistance Pack
9 Review
Enhance Your Development Projects with the NVIDIA Jetson Nano Developer Kit (945-13450-0000-100)
12 Review