>Does anyone know the reasoning behind GM using
>those instead of slotted or phillips screws?
Just speculating, but I believe they were an early attempt at machine driven
high torque fasteners, sort of an ancestor to the Torx pattern still (?)
used by Chrysler.
Because the pattern is closed and deeply inset, the tool end is not supposed
to slip out easily like a blade or phillips driver. Unfortunately, the
screws are made of fairly soft steel, so the heads do strip out under heavy
torque. Then you wind up with heads remarkably like the ones they use in
public restroom stalls to prevent demolition by vandals.
Regards,
Grant S.
54 3100 (mostly all there)
54 3100 (mostly not there)
55 1st 3100 (mostly rust)
Los Angeles, CA
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