Nobody thinks about license plate screws until the moment they absolutely must: the new plate, the new frame, the screw that's rusted into legend. Then it turns out this four-piece hardware set has real variety and zero documentation. Consider this the manual that should have existed.
Sizes: the manufacturer lottery
There's no universal plate screw. The common patterns: domestic US vehicles mostly take slotted hex or #14 self-tappers into plastic nuts; Japanese makers (Toyota, Honda, Nissan, Mazda, Subaru) run M6-1.0 machine screws into threaded holes; German makers often M5 or M6 with captive nuts. Rule of thumb: if the old screw came out clean, match it at the hardware store rather than guessing from charts — ten minutes and €2 beats stripped threads.
Material: buy stainless once
Factory plate screws are usually zinc-plated steel, which is why they're usually rusted. Stainless steel costs pennies more and ends the rust cycle permanently — the single best €3 upgrade in this entire category. Add nylon washers to protect a frame's finish, especially on patterned or coated frames like ours.
Anti-theft hardware: worth it where plates walk
Plate theft is regional but real (stolen plates launder toll and gas drive-offs). Security screws — Torx-pin, snake-eye, or one-way heads — cost €5–10 and defeat opportunists armed with the screwdriver everyone carries. Keep the odd bit in the glovebox, not the garage.
The stuck-screw escape ladder
Penetrating oil and patience first; correct-size bit with real downforce second (stripping happens from spinning, not strength); rubber band in the stripped head third; drill-out last (the full rescue guide walks it step by step). Then install whatever's next — frame mounting order and torque sense are in the install guide — with stainless, so you never read this section again.
