I believe that during WWII there was a specially employed
lady, complete with tattoos presumably, whose task it was to
tighten the set-screws on all military equipment. She did such a
good job that nobody except a certain candidate for the
governorship of California has since been able to move them.

Many, MANY years ago I wanted to remove the knobs from several pieces of
equipment (BC-610 tuning units vaguely comes to mind), and I recall that
I stripped an average of one properly-sized Allen wrench per knob removed.
Fortunately, the town where I was living at the time (Fort Collins, CO)
had a "war surplus" store, and -- even more fortunate for me -- they had
bins AND BINS of Allen wrenches of the proper size for a dime apiece!
Needless to say, I bought a lot of them!

--Myron.
--
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
PhD EE (retired). "Barbershop" tenor. CDL(PTX). W0PBV. (785) 539-4448
NRA Life Member and Certified Instructor (Home Firearm Safety, Rifle, Pistol)