I'm trying to find a solution to my cowl pins on my -6A. From backing out. Thank you JW
Don’t the plans call for a tab and screw? I’ve seen planes flying with no retention, and they migrate forward.. I’ve even heard over time, they’ll migrate into the spinning propeller!!
 
My side cowl pins are removed aft of the firewall, the through at 1/4” AN bulkhead fitting. I use 1/4” aluminum tube between the firewall and the next aft bulkhead that has this AN fitting.. The pins are caputured by putting a closed end 1/4” tube on the aft side of this fitting.

Carl
 
I made a loop on the end of the pin (heated it red hot and curled it) and have a recessed spot it drops into with a nutplate. Screw and washer holds it. Not fancy, but simple.
 

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