Mechanical Information

Dimensions #

The mechanical dimensions of the M.2 M-key Stack FMC are illustrated in the figures below. All dimensions are in millimeters (mm).

The assembly drawings are also available as PDF files that you can download at the provided links.

• M.2 M-key Stack FMC Rev-A Assembly Drawing PDF

3D Model #

The 3D model of the board is available as a STEP file at the link below:

• M.2 M-key Stack FMC Rev-A 3D STEP model

Mezzanine fastening hardware #

For mechanical fastening of the mezzanine card to the carrier board, the M.2 M-key Stack FMC comes pre-assembled with 4x hex standoffs and 4x machine screws. The M.2 M-key Stack FMC also comes with 2x machine screws for fixing the FMC to the carrier board. We highly recommend using these machine screws to fix the mezzanine card to the carrier board.

The hex standoff and machine screw part numbers are listed below:

• Hex standoff, Thread M2.5 x 0.45, Brass, Board-to-board length 10mm
  Part number: V6516C
  Manufacturer: Assmann

• Machine screw, Thread M2.5 x 0.45, Length (below head) 4mm, Stainless steel, Phillips head
  Part number: 90116A105
  Supplier: McMaster-Carr

M.2 module fastening hardware #

For mechanical fastening of the M.2 modules to the FMC card, the M.2 M-key Stack FMC comes pre-assembled with 2x M.2 standoffs that can be moved to suit the length of the M.2 modules being used. Also provided are 2x machine screws for fixing the M.2 modules to the FMC, the part number is listed below:

• Machine screw, Thread M2.5 x 0.45, Length (below head) 3mm, Stainless steel, Phillips head
  Part number: 90116A104
  Supplier: McMaster-Carr

Note that these screws are 1mm shorter than those used to secure the FMC card.

Fastening hardware for second FMC #

For mechanical fastening of the second FMC to the M.2 M-key Stack FMC, 4x hex standoffs are provided and the part number is listed below:

• Hex standoff, Thread M2.5 x 0.45, Brass, Board-to-board length 10mm
  Part number: V6622C
  Manufacturer: Assmann

We highly recommend using the provided mounting hardware when using a second FMC with the M.2 M-key Stack FMC, as it ensures a stable and reliable connection between the boards.

Instructions for attaching a second FMC to the M.2 M-key Stack FMC can be found in the getting started guide.