Screw. Bolt. 20F. A used to secure The Cargo Cover to its Mounting Surface. Door Mirror Housing. Engine Control Module ((ECM)). Headlight Level Sensor. Interior Quarter Panel Trim Panel. Keyless Entry Module. Tapping HEXAGON Flange Head. A Threaded Rod with a Drive Head (such as Hex. 12 Point. torx. etc) on One End used to secure The Engine Coolant Filler Neck to its Mounting Point.