Did some homework last night on the hardware for the '69 RS covers. The AIM covering the Z22 RS headlight door assembly, page 459 calls out screw 9425501 and stamped nut 9419751. I found the screw in a 2014 AMK Products catalog I have on hand. I'll double check the website to see if they still list the screw.
Screw 9425501 is an 8-32 x 1/2 with 0.32" OD Phillips head. AMK's S2 finish = gray/black phosphate, item #B-12568. This matches the screw finish KevinW posted in his picture. Heartbeat City Camaro now sells a kit GNL-1179, that includes (4) correct black phosphate screws and (4) stamped thread cutting nuts finished in silver zinc.
KevinW...are your nuts original can you post a pic showing the finish?
BTW...
Noticed in KevinW's picture that the die cast frame plate Det. 11 is dip black painted. The reproduction die cast frames are bare aluminum finish.
I have seen in the comments section of the certification reports that Jerry MacNeish has done, the die cast hinge Det. 16 should be black. This makes since that both pieces would be black dip painted black.
Thanks, Dave