BVM PNP F-86 Construction And Operating Manual page 12

When mounting the fan, slide the intake into
position, then slide the fan onto the inlet. This
will become the location for your fan to sit
Use a 1/16 drill bit to mark the location of the
mounting holes.
Use 4-40 bolts and blind nuts to mount your
EVF unit in place..
We recommend using some Qt poxy to hold the
blind nuts in place. BVM # PA-SR-0042
BVM®2017 11 11/07/2017