Insulator retainer nut. A nut used to secure the sound absorber to its mounting point. A used to align the Sound Absorber and it's mounting point. Cowl Insulator Nut. Dash panel insulator mounting nut. Secures the dash panel insulator to the vehicle. Dashboard Panel Insulator Clip. Fender Closing Plate Nut. retainer. Cowl. Dashboard Panel Clip. Engine Compartment Insulation. Fender Closing Plate. PLASTIC. Silencer. Sound Absorber Guide Pin.