Tri-Wing Screws: Features and Tools for Screwing and Unscrewing

Anyone who knows mechanics knows that there are different types of screws for different uses. Among these, we have Tri-Wing models that allow you to achieve a security closure that is difficult to achieve with other solutions. Not by chance, as Wikipedia reminds us, these screws were used in the aerospace sector and particularly by Boeing. Then, the use of Tri-Wing spread to other sectors.

What is the reason for the success of this screw system? It is an excellent tamper-proof security mechanism. The screws we are describing, in fact, need a specific screwdriver with a tip that reproduces the same imprint to be screwed in or unscrewed, making unauthorized use difficult. But are these the only reasons to use Tri-Wing screws?

What Are Tri-Wing Screws: Definition

Tri-Wing screws – also known as three-wing screws – are locking systems with threading that allow you to fasten two elements with a security system, difficult to handle for those who don't have the specific screwdriver or insert. In fact, the screws in question have a head characterized by three grooves with a 120-degree angle that form a figure similar to a Y or a cloverleaf.

In What Cases Do We Use These Screws?

Tri-Wing solutions are used in cases where there is a need to ensure that equipment cannot be tampered with or that elements remain sealed. For example, you can find this type of screw in electronic devices such as gaming consoles, computers, and cell phones. They are often applied to particularly sensitive industrial equipment.

All this is done to prevent do-it-yourself repairs or modifications. You need to understand that tri-wing screws are not useful options for ensuring extreme tightening, we are not talking about security screws against self-loosening: they are tamper-proof devices. Therefore, they must primarily fulfill the task of preventing unplanned activity.

The Characteristic Shape of the Three-Wing Screw

The key element of this locking element is, of course, the shape of the stylized star head that is used to screw and unscrew the element. Among the other advantages of this support – perfect for preventing the screw from being manipulated without proper tools – we also remember that the triangular shape of the head offers good distribution of tightening force.

Thus reducing the risk of damage to the screw during installation. Often there is the possibility of damaging the metal during misuse with the corresponding need to use the extractor for damaged screws that won't unscrew. The head of this screw can be either domed or flat, the latter solution perfect for conditions where we need to maintain a clean profile.

Bits, Inserts, or Screwdrivers for Tri-Wing

Unscrewing a Tri-Wing screw without proper tools is not easy. In fact, it's an undertaking best avoided if you don't want to permanently damage the head of this screw. To work on this front, we need to choose and use appropriate tools. First, you can choose screwdrivers with the same shape that you can find in different sizes.

If you prefer the power screwdriver, a better solution if you need to work under professional conditions and perform multiple activities in a short time, there are dedicated inserts that can perform this function. Just like the ones you can find in the LTI catalog.

These inserts – manufactured according to LTI/Krino quality standards – are compatible with power screwdrivers and ratchet screwdrivers: there is the base bit and the power bit, made from resistant steel to guarantee superior hardness and better toughness, to resist the torque exerted by these tools. With these tools you can work like an industry professional.