GoToGuy,
Your photo reminded me of some factory locking fasteners
I used to find on Chevrolet vehicles back in the day. More
specifically, needing to remember to bring a suitable flat
chisel to the Treasure Yard in order to be able to remove
the factory cast iron exhaust manifolds from a SBC...so
that we could take those double-bump heads with us. (!)
(see attached below -- replacements for sale at Jeg's.)
My curiosity piqued, I tried to find out a little more about
how Chevrolet essentially took inexpensive stamped steel
and allowed them to get the safety wire functionality for
1/100 of the installation time/labor/cost.
Once I tunneled down in some of the 100-point 'vette restoration
conversations, I found out that the actual name for these
things are "French Locks". (?)
Then I found a picture of a pair of fasteners secured by a factory
French Lock on the halfshaft of a '66 Corvette:
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(credit: corvetteforum.com (
link)
NOTE: And if you find yourself riding around in one of these old 'Vettes as either driver or riding shotgun,
and you aren't absolutely sure that these are installed & providing the extra security against a halfshaft
loosening & flailing away (think of what little is between that halfshaft & your back) ...then run, don't walk
to these folks and buy a set asap:
Cheap insurance, yet often tossed/lost/forgotten by the PO. Don't leave the driveway without 'em!
You must be registered for see images attach
****
You know, this whole safety wire conversation has been really interesting.
Who knows? Maybe someone will read about our fixation with keeping
things together at high speeds & decide to add a little cheap mechanical
insurance policy here & there on their own project(s).
Positive locking for safety isn't only installing cotter pins on the steering
bits -- especially if you've added additional twist to your drivetrain!)
Safe travels --