Raspberry Pi Adapter for Raspberry Pi 3, 4, or Zero.
Recommend mounting with all 4 standoffs if the USB, ethernet, or HDMI connectors are used. 2 standoffs are fine if there are just connections to other modules mounted to a module backplane (therefor little stress on the connections and boards).
Module size: 4.5"x2.5" nominal (4.4"x2.4" actual).
Mounting holes: 4x #4 screw holes (0.116") on 0.5" grid. 4"x2"
Contents: module PCB with all hardware to mount a Raspberry Pi included (M2.5x0.45 sized - 4x standoffs 6mm Aluminum, 8x screws. updated since some of the pictures), no #4-40 hardware included to mount the adapter to module backplanes.