Choosing the Right Number Plate Screws for Your NZ Vehicle

Choosing the Right Number Plate Screws for Your NZ Vehicle

Replacing old, rusty, or worn number plate screws is one of those quick wins that makes a real difference to how your plates look — and, if you choose the right type, how secure they are. But not all screws are the same, and picking the wrong size or head type is an easy mistake. This guide breaks it all down.

Step One — Choose Your Screw Head Type

There are three head types available, and this is usually the first decision to make:

Phillips (Posi)

The classic cross-head screw. Phillips screws are the most common type found on NZ vehicles from the factory. They're straightforward to install and remove with a standard Phillips screwdriver or drill bit — which also means anyone with a screwdriver can remove them. Great for everyday use where security isn't a concern.

T30 (Torx)

A six-pointed star-shaped head that requires a T30 Torx bit to install and remove. T30 screws are more resistant to cam-out (the bit slipping) than Phillips, making for a cleaner install. They also offer a mild deterrent against casual theft since most people don't carry a Torx bit — but they're common enough that they're not a true security measure.

T30 Security Pin (Anti-Theft)

These look like a standard T30 Torx screw but have a centre pin in the socket that prevents a regular Torx bit from seating. Removal requires a matching security bit. This makes them significantly harder to remove without the right tool, making them the best option if number plate theft is a concern — which it increasingly is in NZ.

Note: if you go with security screws, keep your security bit somewhere safe and accessible. You'll need it any time you need to remove your plates.

Step Two — Choose Your Size

Our screws come in two sizes to suit different vehicle mounting points:

M6 (Machine Screw)

M6 is a metric thread screw designed for vehicles with threaded metal mounting inserts in the bumper — common on most modern NZ cars, utes, and SUVs. If your current plate screws thread into a metal insert (rather than screwing directly into plastic), M6 is almost certainly your size.

6G (Self-Tapper)

6G self-tapping screws are designed to cut their own thread as they're driven in, making them suited for plastic mounting points. Common on older vehicles or bumpers where the screw goes directly into plastic without a threaded insert. If you're unsure, check your existing screws — self-tappers have a more tapered, sharper thread than machine screws.

Step Three — Choose Your Finish

Both sizes and all head types are available in two finishes:

• Black — suits dark frames or a stealthy, low-profile look. Works particularly well with black plate frames.
• Stainless — a bright, corrosion-resistant finish. A good choice if your vehicle is regularly exposed to salt air or wet conditions, or if you just want a clean chrome look.

Quick Reference

• Standard replacement, easy removal: Phillips (Posi) in M6 or 6G
• Cleaner install, mild deterrent: T30 in M6 or 6G
• Best protection against plate theft: T30 Security Pin in M6 or 6G
• Modern car with metal inserts: M6
• Older vehicle or plastic mount: 6G self-tapper

Shop Number Plate Screws

All variants are $6.00 NZD per set — view the full range and choose your combination here. They also pair perfectly with any of our number plate frames for a complete, finished look.