License plates are mounted with standard hardware that varies by region and vehicle. In the United States and Canada, the typical hardware is #6-32 machine screws (about 1/2 inch to 3/4 inch long) with stainless steel or zinc-coated finishes; in Europe and many other markets, metric fasteners such as M6 x 1.0 bolts are common, with lengths chosen to suit plate thickness and any mounting frame. Some systems also use self-tapping screws or security/anti-theft hardware. This article breaks down the common options and how to choose the right screws for your plate.
Here is a quick breakdown of common hardware by region and mounting style.
Regional norms for license plate screws
Most plates are fastened with #6-32 machine screws, typically 1/2" to 3/4" long. Phillips or Torx drives are common, with stainless steel or zinc-coated finishes. Many setups also use a washer to distribute pressure and reduce plate cracking.
The standard is usually metric hardware, commonly M6 x 1.0 bolts, with lengths chosen to fit the plate and any frame or bumper design. Some vehicles use self-tapping screws for unthreaded bumper panels, and anti-theft options are increasingly available.
Outside North America, you’ll often encounter metric fasteners (such as M6 variants) or locally specified hardware. Always check the plate layout and vehicle mounting points to choose the correct size.
The exact choice can vary by vehicle trim, aftermarket frames, and regional regulations. Verify the mounting holes on your car and any local rules about front plates before buying hardware.
Screw head types, lengths, and materials
Understanding the common head styles, drive types, and materials helps ensure a secure, durable mount without damaging the plate or bumper.
Pan head or round/countersunk machine screws are typical; common drives include Phillips and Torx. Stainless steel is preferred for corrosion resistance; zinc-coated steel is a budget alternative.
Similar options apply, with metric screws (like M6) and a range of head shapes. The drive types follow standard tool expectations (Phillips, Torx, or Pozidriv where applicable).
Typical lengths range from about 1/2" (12–13 mm) to 3/4" (19 mm) for standard plates with frames; longer screws may be needed for thick frames or plastic bumpers. Always avoid screws that protrude behind the mounting surface.
Choose corrosion-resistant materials (stainless steel or coated steel) and consider using washers to prevent plate damage and rattling.
Security options and installation tips
For theft deterrence and vandal resistance, many drivers opt for security hardware or anti-theft mounting kits. Here are common approaches and practical tips.
Tamper-resistant heads (Torx security, tri-wing, or one-way screws) and locking nuts are widely available. These require a matching driver or key to remove the plate.
Some plate frames include integrated anti-theft features or use non-removable spigots, reducing the temptation to steal a plate.
Use a proper screwdriver or bit, avoid overtightening to prevent plate cracking, and apply a small amount of anti-seize or thread-locking compound only if recommended by the manufacturer of the hardware. Keep any security tool bits in a safe place.
Security options can add complexity if you ever need legitimate removal (for example, for law enforcement requests or maintenance). Plan ahead by storing any required driver bits in a secure location.
Summary
License plate screws are not universal; the two most common standards are US/Canada’s #6-32 machine screws and Europe’s M6 x 1.0 metric bolts. Let regional norms, plate/frame design, and local regulations guide your choice. For everyday mounting, choose corrosion-resistant screws (stainless or coated) of a length appropriate to your plate thickness and frame, and consider security hardware if theft is a concern. Always verify your vehicle’s mounting points and avoid overtightening to prevent damage.
What size screws do number plates use?
Available in two sizes (19mm and 24mm, x 4.8mm) we stock these in yellow, black, and white with the 19mm also available in blue.
What type of screw for license plate on car?
Slotted Hex Washer Head Self Tapping Sheet Metal Screws. AKA License Plate Screws. License plate screws are used to secure the license plate to your vehicle. They are self-tapping and do not require a pre-drilled hole.
What kind of screws do you need for your license plate?
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.
Do license plates use regular screws?
We're sorry to break it to you: there's not a standard license plate screw size. One-fourth of an inch in diameter by three-fourths of an inch in length is the most common screw size; ¼” X ⅞” is also fairly common; then there are a ton of other specialized types and sizes.