Raspberry Pi 160pcs M2.5 Series Hex Brass Spacers Standoffs+nuts+screws Kit Accessories For Raspberry Pi 4 Model B/3b+/3b/2b/b+ - Demo Board Accessories - AliExpress
Raspberry Pi HAT Brass Base Stacking Standoff Kit - Spell Foundry
210Pcs Assorted M3 M2.5 Nylon Screws/Nut/Standoffs/Spacers for DIY Air
Amazon.com: HanTof Raspberry Pi 3 Model B+ Standoffs Pack 24 Pieces/LoT M2.5 (11mm Body + 6mm Screw) Hex Brass Standoff Cylinder + Screw + Nut Kits for Raspberry pi 3 B Plus/3B/2B/B+/A+
Universal Raspberry Pi Hat Case+ Standoffs + Screws+ Nuts Diy Kit, Generic Case Kit For Raspberry Pi 4 Model B/ Pi 3b+ Plus/3b - Demo Board Accessories - AliExpress
Raspberry Pi HAT Brass Base Stacking Standoff Kit - Spell Foundry
Nylon 12mm M2.5 Standoff Set – Pack of 4
Raspberry Pi HAT Brass Stacking Standoff Kit - Spell Foundry
The Absolutely Worst Raspberry Pi Case : 8 Steps (with Pictures) - Instructables
Raspberry Pi Standoff Size – desertbot.io
hardware - What size screws does the Raspberry Pi board use? - Raspberry Pi Stack Exchange