I always thought the purple ones were from A-7's???
The brass ones are canopy shear pins from a TA-4J.
And sad to say, I never owned a Harley, just had the vision pumping thru my veins. Although I have had a couple of bikes the last was when I took care of my buddy's BMW R100 S for almost 2 yrs. Soon though soon, I'll have a hog between my legs.