Retaining spring clip.

To fit:
911 1974-1989 - Used to secure the bonnet and engine lid gas struts
911 1989 - Used to secure the clevis pins in the pedal assembly
911 (964) 1989-1994 - Used to secure the bonnet and engine lid gas struts, handbrake cable and pedal assembly
911 (993) 1994-1998 - Used to secure the bonnet and engine lid gas struts, handbrake cable and pedal assembly
914 1970-1976 - Used to secure the clevis pins on the handbrake cables
928 1978-1995 - Used to secure the clevis pins on the handbrake cables