Pololu - Aluminum Standoff for Raspberry Pi: 11mm Length, 6mm M2.5 Thread, M-F (4-Pack)

These hexagonal male-female aluminum standoffs are intended specifically for use with the Raspberry Pi. They keep parts spaced 11 mm apart, which is just the right height for mounting expansion boards with standard-size female headers, and they have 6mm-long M2.5 threads that are just the right size for the Raspberry Pi’s mounting holes. These standoffs are sold in packs of 4.

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+

Raspberry Pi Project Kits & Components

Pololu 2084 - Aluminum Standoff: 3/8 Length, 2-56 Thread, F-F (4-Pack) - Kamami on-line store

Pololu - Male-Female Standoffs

Pololu - Aluminum Standoff for Raspberry Pi: 11mm Length, 6mm M2.5 Thread, M-F (4-Pack)

Raspberry Pi Project Kits & Components

Generic M2.5 Nylon Hex M-F Spacer/Screw/Nut Assorted Kit, for Raspberry-Pi, Standoff.: : Industrial & Scientific

Aluminum Standoff for Raspberry Pi: 18.6mm Length, 6mm M2.5 Thread, MF (4- Pack) - Melopero Electronics

Pololu

Aluminum Standoff for Raspberry Pi: 18.6mm Length, 6mm M2.5 Thread, MF (4- Pack) - Melopero Electronics

Pololu

Aluminum Standoff for Raspberry Pi: 18.6mm Length, 6mm M2.5 Thread, MF (4- Pack) - Melopero Electronics

M2/2.5/3/4/5/6 Aluminum Round Threaded Sleeve Standoff Pillar Long Nut Connector