Are all license plate bolts the same?
Short answer: no. License plate mounting hardware comes in a variety of sizes, styles, and configurations depending on the region, vehicle, and mounting method. Understanding these differences helps you choose compatible screws, bolts, or studs so your plate stays secure without damage.
What varies among license plate fasteners
The main differences you’ll encounter include thread size and type, head drive style, length, mounting method, material, and security features.
- Thread size and pitch: In the United States, you’ll often see imperial sizes such as #6-32 machine screws, while metric variants like M6 x 1.0 or M5 x 0.8 are common on many non‑US or imported vehicles. Not every car uses the same thread, so checking the specific vehicle is important.
- Head drive style: Common drives include Phillips, slotted, Torx, and hex. Some fasteners are tamper‑proof (security) types with special heads designed to deter theft or vandalism.
- Mounting method: Some cars mount with screws directly into threaded holes in the bumper or plate bracket, others use studs that the plate or frame slips over, and some kits rely on nuts behind the bumper or frame.
- Length and fitment: Lengths typically range from roughly 1/2 inch to about 1 inch, depending on plate thickness, bumper design, and whether a frame or bracket is used. Using the wrong length can crack the plate or fail to secure it properly.
- Material and corrosion resistance: Stainless steel is common for outdoor use due to better corrosion resistance; zinc‑plated steel is cheaper but may rust over time, especially in salty or humid environments.
- Security features: Standard screws/bolts are widely available, but many owners opt for anti‑theft or tamper‑proof hardware to reduce the risk of theft.
- Regional and vehicle differences: Europe, Asia, and Australia often use metric threads (e.g., M6) whereas the US has a strong prevalence of imperial sizes (e.g., #6-32). Vehicle design and aftermarket brackets also influence what hardware fits.
Understanding these factors helps you pick hardware that fits your car’s mounting points, avoids cross‑threading, and keeps the license plate secure in all weather conditions.
How to identify the right bolts for your vehicle
Use these practical steps to determine the correct hardware for your specific car and plate setup.
- Consult your vehicle’s owner’s manual or the dealership/spec sheet for manufacturer‑recommended mounting hardware or thread sizes.
- Inspect the mounting points on the bumper or license plate bracket to see whether holes are threaded or if you’re dealing with bare metal/plastic that will take self‑tapping screws or studs.
- If you have an existing plate or frame, remove it and measure the screw diameter, pitch, and exposed length. Compare measurements to common sizes (e.g., #6‑32, M6, etc.).
- Decide whether you need screws into threaded holes, self‑tapping screws, or studs with nuts. This will determine the driver type (Phillips, Torx, etc.) and whether nuts are required behind the mounting surface.
- Choose the correct length so the plate sits flush without bottoming out or poking through the bumper. Err on the side of a shorter bolt if clearance is tight.
- Pick material and finish appropriate for your climate (stainless steel for corrosion resistance; zinc‑plated if cost is a concern and corrosion risk is moderate).
- Consider security if theft is a concern; tamper‑proof or anti‑theft hardware can be an option, especially for front plates in high‑visibility locations.
Following these steps will help you select hardware that fits correctly, resists corrosion, and reduces the chance of damage to your license plate or bumper.
Summary
License plate bolts are not universal. Variations exist in thread size and type (imperial vs metric), head drive, length, mounting method, and material, plus the option for tamper‑proof hardware. To ensure a proper, secure fit, identify your vehicle’s mounting requirements, measure the hardware you need, and choose corrosion‑resistant, correctly sized fasteners. When in doubt, consult the vehicle’s manual, visit an auto parts store with a sample, or use a universal mounting kit designed for your region and plate type.
Are license plate bolts universal?
The universally compatible slotted pan head screws and hex head screws in #14 x ¾” are favorites, ideal for American vehicle brands like Ford, Chevrolet, GMC, Dodge, Chrysler, and Jeep. Metric license plate screws are tailored for overseas brands like Toyota, Honda, and Nissan.
What kind of bolts do I need for a license plate?
Some of the most reviewed products in License Plate Screws are the Everbilt 1/4 in. x 3/4 in. Universal Slotted Black Truss Head License Plate Bolt (2-Piece per Bag) with 9 reviews, and the Everbilt 1/4 in. x 5/8 in.
What do license plate screws look like?
Typically, license plate screws are either #14 or #12 size with a pan head or hex head for easy installation. Using screws that match your vehicle's mounting holes and frame design can also improve stability.
Do all license plates use the same screws?
No, license plate screws are not universal, as they can vary in size, thread, and head type depending on the vehicle's make and model. While many vehicles use a standard 1/4 inch (6mm) size, some American and Japanese cars may require different threads, and some vehicles may have unique self-tapping or plastic retainers. To ensure a proper fit, check your vehicle's specifications or take an existing screw to a hardware store for comparison.
Common types and variations
- Standard American: Many American-made vehicles use a #14 or 1/4 inch x 3/4 inch self-tapping screw, often with a hex or pan head.
- Metric: Some Japanese cars, like those from Toyota or Honda, commonly use metric screws, which can be compatible with many "universal" kits that specify M6 (6mm) compatibility.
- Self-tapping: Some vehicles use self-tapping screws that create their own threads directly into the bumper material, while others have pre-existing threaded holes.
- Plastic retainers: Some cars have plastic inserts that the screws go into. In this case, you might need a specific type of screw or a new plastic retainer to repair corroded holes.
How to find the right screws
- Check your vehicle: Look up the specific screw requirements for your car's make, model, and year.
- Take a sample: Remove one existing screw and take it to a hardware or auto parts store to find an exact match or a compatible replacement.
- Buy a "universal" kit: If you want to be prepared, purchase a kit that includes both American and metric sizes or one that specifies compatibility with your vehicle type.
