What size screws do license plates use?

Standard US license plates use 1/4-20 screws or 6mm metric screws depending on the vehicle make. Most plate frames and covers include the correct screws. Older vehicles may have #14 sheet metal screws. If the included screws do not fit, take an existing screw to a hardware store to match the thread.

Do I need to remove the plate to install a license plate cover?

Yes, for a full-face cover that snaps over the plate. The plate must be removed to place the cover behind the plate. For frame-only products that mount over the face without covering it, you only need to remove the screws to slide the frame over the plate.

How to Install a License Plate Cover: Step-by-Step Guide

Installing a license plate cover takes 5-10 minutes with a screwdriver. This guide covers the tools needed, removal of the old plate, correct screw torque, and tips for preventing future cracking.

Rusted screws, a stripped head, or a plate that will not sit flush. None of it is complicated, but each step has a wrong way to do it that ends in a cracked cover.

Installing a license plate cover takes 5 to 10 minutes done correctly.

Here is the full process: removing the old screws, seating the new cover or frame, and reinstalling the plate without overtightening anything.

You need a Phillips-head or flathead screwdriver depending on the existing screws, the new cover or frame, and the mounting hardware that comes included with it.

Step 1: Remove the Existing Screws

The standard license plate has two or four mounting screws. Turn counterclockwise to remove.

If the screws are rusted or frozen: apply penetrating oil (WD-40 original) and wait 5-10 minutes before attempting removal. Forcing a stuck screw strips the head — once stripped, removal requires a screw extractor bit.

If the screws turn but do not release: some vehicles use pop rivets or clips behind the bumper. Check behind the bumper for a second nut securing the screw. In some cases, the entire license plate bracket must be accessed from inside the bumper.

Step 2: Remove the Old Plate and Cover

Slide the plate free from the mounting bracket. If there is an existing cover, remove it. Inspect the mounting bracket and bumper for corrosion or damage.

Step 3: Install the New Cover

For snap-over covers: align the cover over the plate face. Snap the corner clips into place. The plate should be held firmly against the cover back without rattling.

For frame-style products: slide the plate into the frame channel, or position the frame around the plate perimeter.

Step 4: Reinstall the Plate

Position the plate and cover together over the mounting holes. Thread screws by hand to align, then tighten with the screwdriver.

Do not overtighten. Hand-tight plus a quarter-turn is sufficient. Overtightening causes cracking at the screw holes. If the cover includes rubber washers, use them — they cushion the mounting point and prevent stress cracking.

Step 5: Check Visibility

After installation: stand at a normal distance and verify all characters are fully visible through the cover. Any cover that obscures any character creates a legal issue regardless of intent.

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