License plate screws are small fasteners that hold your plate to your vehicle's frame, and they must meet your state's specifications
Your license plate needs screws that fit the holes in both the plate and your vehicle's mounting bracket. Most states require stainless steel screws that resist rust, typically in sizes 1/4 inch or 5/16 inch diameter. The length matters too — usually 3/4 inch to 1 inch — because a screw that's too long can damage your vehicle's frame or create a safety hazard, while one that's too short won't hold the plate securely.
Some states specify the exact type of screw you must use. A few require anti-theft screws with a special head that needs a unique tool to remove, designed to prevent plate theft. Others allow standard Phillips head or slotted screws. Your state's Department of Motor Vehicles website or your vehicle's owner's manual will tell you what's permitted where you live.
Key Takeaways
- Stainless steel screws in 1/4 inch or 5/16 inch diameter, 3/4 inch to 1 inch long, work for most states, but your state may have specific requirements.
- Some states require anti-theft screws with a special head that cannot be removed with a standard tool.
- Hardware stores, auto parts retailers, and online sellers all carry license plate screws, usually in packs of four for under $10.
- Tightening screws too hard can crack the plate or strip the threads; hand-tight plus a quarter turn is usually sufficient.
Where to buy license plate screws
Auto parts chains like AutoZone, O'Reilly, Advance Auto Parts, and NAPA carry license plate screw kits in their fastener sections. Most sell packs of four screws — the standard number needed for two plates — for $3 to $8. Hardware stores including Home Depot and Lowe's stock stainless steel screws in the fastener aisle, though you may need to buy them individually or in larger packs than you need.
Online retailers like Amazon, eBay, and Walmart sell license plate screw kits, often with anti-theft options if your state requires them. Some kits include the special removal tool. If you're replacing screws on an existing plate, you can often remove one screw and bring it to a hardware store to match the size and thread type, then buy the exact replacement you need.
Stainless steel versus other materials
Stainless steel is the standard because it resists rust and corrosion from road salt, moisture, and weather. Regular steel screws will rust over time, especially in cold climates where salt is used on roads, and rust can make them impossible to remove later. Stainless steel costs slightly more but lasts the life of the plate.
Some sellers offer brass or nickel-plated screws, which also resist corrosion but are less common for license plates. Avoid plain steel screws unless your state specifically permits them — they will corrode and may seize in place, making future plate removal difficult.
Anti-theft screws and when your state requires them
Anti-theft license plate screws have a unique head design — often a pin in the center or an unusual shape — that requires a special tool to remove. States that mandate them do so to reduce plate theft, which is used in crimes like hit-and-runs or toll fraud. California, New York, Texas, and several other states require anti-theft screws on at least one plate; some require them on both.
If your state requires anti-theft screws, you must use them or risk a citation. Kits sold for states with this requirement include the removal tool. If you move to a state with different requirements, you may need to replace the screws when you register your vehicle there. Check your state's DMV website or call your local registration office to confirm what's required.
How to install license plate screws correctly
Start by positioning your license plate against the mounting bracket on your vehicle. Insert all four screws by hand first — one in each corner — so you can see that they're aligned and threading properly. This prevents cross-threading, which damages the hole and makes the screw useless.
Once all four screws are hand-tight, use a Phillips head screwdriver (or the special tool if you have anti-theft screws) to tighten each one. Tighten firmly but do not over-tighten — a common mistake that cracks plastic plates or strips the threads in the bracket. A good rule is to tighten until snug, then add about a quarter turn more. The plate should not move or rattle when you push on it, but you should still be able to remove the screws later without excessive force.
Check your screws after a few weeks of driving, especially if you drive on rough roads or in heavy traffic. Vibration can loosen them over time. If a screw falls out, replace it when ready — a missing screw can cause the plate to hang at an angle, which may result in a citation in some states.
Replacing rusted or damaged screws
If your current screws are rusted, corroded, or damaged, remove them by turning counterclockwise with the appropriate screwdriver or tool. If a screw is stuck, explore penetrating oil like WD-40 and wait 15 to 30 minutes before trying again. Tap the screwdriver gently with a hammer to help it grip the head if the screw is stripped.
Once removed, clean the holes and bracket with a wire brush or cloth to remove rust and debris. Install new stainless steel screws of the same size and type. If you're unsure of the size, bring one of the old screws to a hardware store and ask for a match, or measure the diameter and length with a ruler or caliper.
What happens if you use the wrong screws
Using screws that are too long can puncture the vehicle's frame or fuel tank, creating a serious safety and fire hazard. Screws that are too short won't hold the plate securely, and it may fall off or hang loose — a violation in most states. Using plain steel screws instead of stainless steel means they will rust and eventually seize, making them impossible to remove without damaging the bracket.
If your state requires anti-theft screws and you use standard screws instead, you may receive a citation. Some states also inspect plates during registration renewal and will flag non-compliant fasteners. The cost of replacing screws is minimal, so using the correct type from the start saves time and avoids problems later.
Frequently Asked Questions
What size screws do I need for my license plate?
Most states use 1/4 inch or 5/16 inch diameter stainless steel screws, 3/4 inch to 1 inch long. Check your state's DMV website or your vehicle's owner's manual for the exact specification. If you have an existing plate, you can remove one screw and take it to a hardware store to match the size.
Can I use any stainless steel screw, or does it have to be a license plate screw?
Any stainless steel screw of the correct size and length will work, but kits sold as "license plate screws" are pre-packaged in the right quantity and often include anti-theft options if needed. Buying individual screws from a hardware store costs less if you only need one or two replacements.
Do I need the special tool to remove anti-theft screws?
Yes, if your state requires anti-theft screws, you need the matching tool to remove them. Kits that include anti-theft screws also include the tool. Keep it in your vehicle or at home so you can remove the plate if needed for repairs or registration changes.
What if one of my screws keeps falling out?
The hole in the bracket may be stripped, meaning the threads are damaged and won't hold a screw. Try a slightly larger diameter screw if your state permits it, or have a mechanic drill and re-tap the hole to the next standard size. If the plate itself is cracked around the hole, the plate may need replacement.
Can I use a power drill to tighten license plate screws?
A power drill on a low speed setting can work, but hand-tightening with a screwdriver gives you better control and reduces the risk of over-tightening and cracking the plate. If you do use a drill, stop as soon as the screw is snug and do not force it further.