The purpose of the Convertible Top Rear Bow Lockdown Pin Bracket for late 1968, to 1975 Corvettes is to secure the rear bow to the deck lid while driving with the top up. The bracket attaches to the rear bow and is the receptacle for the Top Rear Bow Lock Down Pin.
Note: Early production 1968 Rear Convertible Hold Down Pin is 1/4" thread. Notorious for breaking and updated to this 3/8" diameter mid-1968 production.