M2.5 Hardware

Use the following hardware for securing the buttons to the button plate.

  • 4x M2.5 - 6mm f/f standoff
  • 4x M2.5 - 4mm screws
  • 8x M2.5 - 6mm screws
  • 4x M2.5 - hex nuts

Install Standoffs

The button plate needs standoffs in order to be secured to the case. Grab 4x M2.5 female-female standoffs. Use 4x M2.5 x 6mm long screws to secure the standoffs to the four mounting holes on the button plate.

Install Button Screws

Place the STEMMA button over the two mounting holes on the button plate. Insert 2x M2.5 4mm long screws through the top of the mounting holes on the button PCB. 

Fasten Button Screws

While holding the button PCB in place, install and fasten  2x M2.5 hex nuts to secure the button PCB. Repeat for the second button.


Plug in the two 3-pin STEMMA cables into the ports on the button PCBs.

Install Button Plate

Fit the button assembly into the case and line up the mounting holes. While holding the button plate in place, insert and fasten 4x M2.5 4mm long screws to secure it to the cast.

This guide was first published on Jan 29, 2020. It was last updated on Jul 12, 2024.

This page (Buttons Assembly) was last updated on Mar 08, 2024.

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