Reproduction 3/8″ Hex 10-24 Nut with .565 Captive Washer. This was used in Various areas like Grilles, Tail-Lights, etc. SOME KNOWN EXAMPLES:- 66 Barracuda Grille, 69 Dart Tail-Light, 69 Plymouth B-Body Tail-Light, 70 Challenger Tail-Light. Replaces OEM Part # 6023202. Also works on B – Body drives side vent box to cowl (inside the car).