These are 8mm standoffs/spacers with M2 threading.
CHANWA 50pcs M2 Brass Round Standoff Spacer Female 2mm
M2 Screw - 8mm (Stainless Steel) - StacksKB
Tsnamay M2.5 x 11mm + 6mm Male to Female Thread Brass Hexagon Hex
CREAP M8 / S=13mm Brass Hex Standoff Pillars Hexagon Female Thread
Csdtylh 400Pcs M2 Motherboard Standoffs&Screws&Nuts Kit, Hex Male
CREAP M8 / S=13mm Brass Hex Standoff Pillars Hexagon Female Thread
M2 Standoff
Csdtylh 400Pcs M2 Motherboard Standoffs&Screws&Nuts Kit, Hex Male
√ Size: M6x20mm+8mm Male-Female Hex Brass PCB Motherboard Spacer Standoff for FPV Drone Quadcopter, Computer & Circuit Board √ Material: Made of brass
uxcell M6x20mm+8mm Male-Female Brass Hex PCB Motherboard Spacer Standoff for FPV Drone Quadcopter, Computer & Circuit Board 3pcs
M2 8mm Threaded Round Spacer/Standoff, Brass, Female-Female - StacksKB