Attaching a state registration plate (GRP) is a seemingly trivial task that every vehicle owner faces when purchasing. However, it is this element that most often becomes the cause of conflicts with traffic police officers. Incorrectly selected fastener, rusty screws or missing plugs can be interpreted as an attempt to hide the license plate or a violation of installation rules, which entails fines and the car being impounded.
The situation is aggravated by the fact that standard bolts, supplied with new numbers or purchased on the nearest market, often do not meet modern requirements for anti-corrosion protection. The owner puts up a new sign, and six months later he discovers that the fasteners are rusty, the threads are stuck, and the number itself is loose. Moreover, legislation strictly regulates the type of fasteners used, requiring the availability of appropriate GOST or TU.
In this article we will analyze in detail which bolts are needed to install the license plate in order to avoid problems with the law and ensure the durability of the fastening. You will learn about size standards, types of coating, and why ordinary black screws are a direct path to fines. We will also touch on the topic of protective frames and secrets that will protect your license plate from theft.
Legal requirements and GOST standards
The main document regulating the installation of license plates in Russia is GOST R 50577-2018 (and its current updates). According to this standard, fastening of the GRZ must be carried out using bolts or other fasteners that ensure reliable fixation. The key requirement is that the fastener does not cover the license plate symbols and does not have any extraneous images that could be considered advertising.
Particular attention should be paid to the color of fasteners. The bolts must be silver (nickel-plated, chrome-plated or stainless steel). The use of black, colored or rusty bolts is a violation. The traffic police inspector has the right to issue a fine under Article 12.2 of the Code of Administrative Offenses of the Russian Federation if he considers that the number has been installed with violations that make its identification difficult. Fine can range from 500 to 5000 rubles, and in the worst case - deprivation of rights.
It is important to understand that standard fasteners are often labeled with the abbreviation TU (Technical Conditions) or GOST. A quality bolt head should have the appropriate markings. The absence of markings or the presence of logos of manufacturers not related to the auto industry may raise questions among inspection authorities. Therefore, when purchasing a kit, always check for a certificate of conformity or at least original packaging indicating the standards.
⚠️ Attention: The use of frames with dealer logos that overlap at least part of the regional symbol or flag is equivalent to making changes to the design of the GRZ. This is a separate article of violations with serious consequences.
Many car enthusiasts do not know that even the material of the frame matters. If the frame is made of black plastic and has a wide border, it may hide the edges of letters or numbers. This is unacceptable. The fasteners must pass through special holes in the frame and number, pressing them tightly to the body or bumper, but without deforming the metal of the sign.
Thread sizes and types: what to choose
Choosing the correct bolt size is critical for safety and aesthetics. The standard Russian license plate has holes with a diameter of 9 mm. However, the diameter of the bolt itself is usually smaller to allow for free passage and adjustment during installation. The most common standard for passenger cars is thread M6.
The length of the bolt depends on where exactly you plan to screw it. If the bumper already has threaded bushings or holes for clips, a length of 10-12 mm is sufficient. If the fastening is made through a through hole with a nut on the reverse side, you will need a bolt 20-25 mm long. Sizes may vary for trucks and motorcycles, so custom fitting is always required.
There are several main types of fasteners used for gas protection:
- 🔩 Round Head Bolts - a classic option that provides tight pressure and an aesthetic appearance. They often have a slot for a Phillips screwdriver (PH2 or PH3).
- 🔧 Countersunk bolts - used in special frames, where the cap must be recessed flush with the surface of the number. Requires precise selection of length.
- 🔐 Secrets - bolts with a special head profile that require a unique key to unscrew. Protect your number from theft.
When choosing the length, it is important not to overdo it. A bolt that is too long may hit body parts, the radiator, or wiring located behind the bumper. This may cause damage to the paintwork on the inside or even cause a short circuit. The optimal length of the protruding part of the bolt after tightening the nut should not exceed 2-3 mm.
If you are screwing a bolt into a plastic bumper without a threaded bushing, be sure to use a wide washer. It will distribute the pressure and prevent the plastic around the hole from cracking due to vibration.
Materials and corrosion protection
The aggressive road environment, reagents, moisture and temperature changes make the license plate mounting area one of the most vulnerable to corrosion. Regular steel coated with zinc (white galvanizing) can withstand one or two seasons, after which it begins to rust. Rust not only spoils the appearance, but also tightly “grabs” the bolt, making its removal without damaging the number plate impossible.
The most reliable solution is to use fasteners made of stainless steel (grade AISI 304 or AISI 316). Such bolts do not rust for years, retain a silvery shine and are easily unscrewed even after several years of use. Stainless steel is inert to most chemicals used by utilities in winter.
An alternative to stainless steel is a carbon steel bolt with a high-quality galvanic coating (nickel-chrome or a thick layer of zinc). However, the quality of such coating varies greatly from manufacturer to manufacturer. Cheap Chinese analogues often have a thin layer that peels off the first time they are installed with a key.
Comparative characteristics of materials:
| Material | Service life | Rust resistance | Price |
|---|---|---|---|
| Black steel | Season 1 | Low | Low |
| Galvanized steel | 1-2 years | Average | Average |
| Nickel plating | 3-5 years | High | Average |
| Stainless steel (AISI 304) | 10+ years | Maximum | High |
You should not save on fasteners, the cost of which is not commensurate with the cost of a new number or the time spent on a trip to the traffic police to restore it. Stainless steel fasteners is an investment in peace of mind.
Why do stainless steels rust?
Sometimes even stainless steel develops rust stains. This is not corrosion of the metal itself, but surface oxidation from particles of ordinary iron dust (for example, from brake pads) or from contact with aggressive chemicals. Such stains can be easily removed with special cleaning pastes for stainless steel.
Theft protection: secrets and anti-vandal solutions
License plate theft is a nuisance that many drivers face. Attackers may be interested in the license plates themselves (for use on stolen cars or for access to paid parking lots) or the contents of the trunk if the license plate is attached to the lid. To protect yourself, it is recommended to use special anti-vandal bolts or secrets.
The secret is a bolt, the head of which has a unique, complex profile (an asterisk with an offset center, a polyhedron, chaotic slots). Included with these bolts is a special adapter key. Without this key, it is almost impossible to unscrew the bolt with a standard tool (pliers, an adjustable wrench, a screwdriver) - the edges simply break off.
When installing secrets, it is important to follow the following rules:
- 🔑 Keep the key in a safe place, but not in the car. It's best to keep it at home or in the document glove compartment that you always take with you. Losing the key will create huge problems if you need to rent a room.
- 🛡️ Combine types. Install two regular bolts and two locking bolts (for example, diagonally). This will reduce the cost of the kit and speed up the process of changing a wheel or number in the field, while maintaining a basic level of protection.
- 🚫 Avoid "one-size-fits-all" sets. Cheap secrets often have a repeating profile. Attackers can buy the same set and easily take your number. Choose branded solutions with a unique notch.
There are also frame designs with locks that completely hide the number. However, the use of such frames should be extremely careful: they should not make it difficult to read the characters from any angle and in any lighting. Otherwise, you risk getting a fine for the modified number.
⚠️ Attention: If you use secrets, make sure that they do not protrude beyond the plane of the license plate by more than 1 mm. Strongly protruding caps can be regarded as an element hiding part of the symbol, or as a design change not intended by the factory.
Secrets are an effective security measure, but only if you have a secure place to store the unique key. Losing a key will turn removing a license plate into a complex locksmith operation.
Instructions for correctly setting the number
The installation process is simple, but requires care and adherence to technology. Incorrect installation may result in the license plate rattling while driving, its loss, or damage to the body. Before starting work, prepare the necessary tools: a Phillips screwdriver (preferably with a magnetic tip), a wrench (usually 10), degreaser and a clean rag.
First you need to try on the number for the seat. Make sure the holes on the number line up with the holes in the body or frame. If the number is new and the holes do not match, do not bend the number by force - this will lead to deformation and cracks in the reflective layer. In such cases, careful drilling of holes in the bumper or the use of an adapter frame is required.
Step-by-step algorithm of actions:
☑️ Setting a license plate
When tightening bolts, it is important not to overdo it. Excessive force can cause the head of the bolt to rotate in the plastic of the bumper or, conversely, the license plate itself around the hole will crack. Use moderate force. If you use nuts on the back of the bumper, use locking washers or self-locking nuts to prevent vibration from loosening the connection over time.
Tightening torque of the GRZ mounting bolts: 2-3 Nm (Newton meter)After installation, be sure to check the number visually from different angles. It should fit tightly, without play. Try shaking it with your hand - if you hear a knock, use rubber washers or use longer bolts lined with thick rubber. This will also reduce vibration noise when driving.
Common mistakes and how to avoid them
One of the most common mistakes is the use of “self-tapping bolts” for metal. They are intended for temporary fastening and quickly rust. In addition, their sharp end can damage wiring or body parts on the back of the bumper. Always use blunt end bolts.
The second mistake is ignoring rubber gaskets. The metal of the license plate is adjacent to the metal or plastic of the body. Vibration causes friction, which wears away the paint and leads to corrosion. The use of rubber washers (often included with high-quality fasteners) solves this problem and prevents rattling.
The third mistake is installing the number “on one bolt” or on Velcro/double-sided tape. This is a direct violation of the rules. The number must be fixed in at least two points (for motorcycles - in one, but securely). The adhesive tape loses its properties under the influence of the sun and frost, and the number can fly off while moving, creating an emergency situation.
Drivers also often forget about the seasonal check. In spring and autumn it is recommended to check the tightness of the bolts. Winter chemicals and temperature changes can weaken threaded connections. Prevention It will take two minutes, but it will save you from losing your license plate on the highway.
What to do if the bolt is rusty and cannot be unscrewed?
Do not try to unscrew it by force - you will rip off the cap. Treat the joint with penetrating lubricant (WD-40 or equivalent) and leave for 15-20 minutes. If it doesn’t help, gently heat the cap with a hair dryer (not open fire!) to expand the metal and try again. In extreme cases, you will have to drill out the bolt.
FAQ: Frequently asked questions
Is it possible to paint the license plate bolts in the body color?
No, you can't do this. According to GOST, fasteners must be silver in color. Painted bolts may be considered by the inspector as an element that makes it difficult to read the license plate or hides part of it, which will result in a fine.
Do I need to change bolts when buying a used car?
Preferably. The previous owner may have used low-quality fasteners that have already begun to rust. In addition, replacing with new security bolts will increase the security of your car from license plate theft.
Are frames with the words “Russia” or a flag allowed?
Frames with state symbols are allowed if they do not overlap numbers and letters, as well as document fields. However, the frame should not have additional advertising inscriptions. It is better to use neutral frames or attach the number without them.
What is the size of the bolts for the license plate on Priora or Vesta?
Most VAZ cars use a standard M6 thread. The length depends on the design of the bumper: usually 12-16 mm for screwing into standard bushings. It is recommended to try on before purchasing, as configurations may vary.
Where can I buy quality bolts for my license plate?
It is better to buy high-quality fasteners (stainless steel, locks) in specialized auto stores, auto lighting and accessories stores, or on large marketplaces, paying attention to reviews and material (AISI 304). In markets and stalls they often sell cheap silumin or ordinary iron with a thin coating.