The red screw is for Honda for Acura models where the middle finger is fully inserted into the fuel tank cap.

Condition:New|Other Part Number:Screw-in Type Oil Cap for Honda |Custom Bundle:No|Fitment 1: for Honda Accord CR-V for Civic S2000, etc|Fitment Type:Direct Replacement|Color:Red|Manufacturer Part Number:Fuel Oil Filler Cap Cover, Fuel Oil Filler Decor Trim Cover|Material:Aluminum|Item Length:2.5 inch|Superseded Part Number:Screw-in Type Oil Cap, Engine Oil Filter cap, bolt-on replacement parts|Vintage Part:No|Modified Item:No|Placement on Vehicle:Front, Oil Filler Caps|Brand:Unbranded|Fitment 2:MDX RSX ,etc|Type:Screw-In Oil Filler Tank|Interchange Part Number:Middle Finger Pattern Fuel Oil Filler Tank Cap Cover, Tank Cap Valve Cover for Honda for Acura |OE/ Part Number:for Honda for Acura , for Honda Accord, for Honda for Civic |Attachment Type:Screw-In|Features:Easy Installation, Heat Resistant, No Drilling Required, Self-Adhesive, Waterproof|Country/Region of Manufacture:China|Universal Fitment:No|Performance Part:No|UPC:Does not apply