Truss Screws: Black Self-Tapping Square Heads

Truss head screws are a type of fastener that can be used to connect thin metal plates such as steel plates and saw plates. They are available in a variety of materials, including zinc, steel, and black oxide, and can be purchased in various pack sizes. Truss head screws are available in different shapes, including round head, flat head, and countersunk head. They can also be purchased with different types of drives, such as Phillips and Torx. When choosing a truss head screw, it is important to consider the appropriate size and material for the specific application.

Truss head self-tapping screws are used for connecting thin metal plates

Truss head self-tapping screws are specifically designed for connecting thin metal plates, such as steel plates and saw plates. They are a type of self-drilling fastener that can create their own thread when attached to metal or non-metal materials. This type of screw is ideal for projects that require secure connections between thin metal components.

To use a truss head self-tapping screw, you first need to create a threaded bottom hole in the part being connected. The screw is then inserted into this hole, tapping an internal thread within it to form a strong connection. The large pitch and slightly smaller diameter of the screw threads, compared to ordinary screws, contribute to its effectiveness in thin metal plate applications.

The truss head design of these self-tapping screws provides a distinct advantage. It offers a combination of high locking performance and low screwing torque, resulting in better working performance than ordinary self-tapping screws. This feature even allows truss head self-tapping screws to be used as a substitute for machine screws in certain situations.

When selecting truss head self-tapping screws, you can choose from various materials, including stainless steel, steel, and zinc plating. The truss head shape also comes in different variations, such as round head, flat head, semi-countersunk head, and countersunk head. Additionally, the screws are available in a range of colors, including black, blue, silver, and grey.

They are ideal for connecting steel plates, saw plates, etc

Truss head self-tapping screws are ideal for connecting steel plates, saw plates, and other thin metal plates. They are designed to self-drill and create their own matched female thread in the pre-drilled holes of metal or non-metal materials. This makes them perfect for creating secure connections between thin metal plates.

To use truss head self-tapping screws for connecting steel plates or saw plates, you need to first create a threaded bottom hole in the connected part. The self-tapping screw is then screwed into this threaded hole. The thread surface of the screw has a high hardness (equal to or greater than hrc45), allowing it to tap an internal thread within the connected part, resulting in a strong and reliable connection.

The unique thread design of truss head self-tapping screws sets them apart from ordinary screws. When using the same large diameter, the pitch is larger, and the small diameter is slightly smaller, ensuring standardized connections. Additionally, the self-tapping locking feature of these screws provides low screwing torque and high locking performance, outperforming ordinary self-tapping screws and even replacing machine screws in some applications.

Truss head self-tapping screws are available in various colours, including black, blue, silver, and grey, to match your project's aesthetic requirements. They are typically made of carburized steel, ensuring that the surface hardness of the material after heat treatment is not less than 45hrc. This manufacturing process guarantees the high quality and performance of the screws.

The screws are made of carburized steel

Carburized steel is an excellent choice for screws as it enhances their strength and durability. The treatment results in the formation of high-carbon martensite on the surface, providing hardness comparable to tool steel. Meanwhile, the centre of the screw becomes low-carbon martensite, which offers superior toughness. This combination of surface hardness and core toughness makes carburized steel screws ideal for applications requiring strong and durable fasteners.

The carburizing process can be controlled to achieve specific material properties. By adjusting the time and temperature, the depth of carbon diffusion can be varied. Additionally, different carburizing techniques, such as gas carburizing, liquid carburizing, or pack carburizing, can be employed depending on the size and nature of the workpiece. This versatility allows for the treatment of various screw sizes and geometries while ensuring maximum contact between the screw surface and the carbon-rich elements.

Carburized steel screws also offer improved plating performance. The cleaning processes before and after carburizing ensure that the screws are free from contaminants and cooling oil, resulting in a high-quality finish. The treatment enhances the screws' aesthetic appeal and makes them suitable for a range of surface treatments.

Overall, the use of carburized steel for square truss screws with black heads and self-tapping capabilities offers a combination of strength, toughness, and plating performance. The heat treatment process tailors the material's characteristics to meet the specific demands of fastener applications, making it a reliable choice for various industries.

Truss head self-tapping screws are used for connecting gypsum wallboards to metal keels

Truss head self-tapping screws are ideal for connecting gypsum wallboards to metal keels. They are designed with a wide, slightly domed head, providing an excellent load distribution and a secure hold. The sharp point of the screw allows for easy starting and driving into metal sheets, while the low-profile head ensures a neat and professional finish.

Truss head self-tapping screws are available in a range of materials, including stainless steel, zinc, and black oxide. Stainless steel screws offer superior corrosion resistance, making them suitable for outdoor applications. Grade 316 stainless steel, in particular, is ideal for marine or coastal environments due to its exceptional corrosion and chemical resistance. Alternatively, Grade 18-8 stainless steel is a cost-effective option that provides good all-around corrosion resistance for both indoor and outdoor use.

When connecting gypsum wallboards to metal keels, it is essential to ensure that the screws are long enough to provide a secure hold. Truss head self-tapping screws are available in various lengths to accommodate different sheet thicknesses. It is recommended to select the appropriate length based on the specific application and material thickness.

The process of connecting gypsum wallboards to metal keels using truss head self-tapping screws is straightforward. The threaded bottom hole is created in the connected part, and then the self-tapping screw is screwed into the hole. The high hardness of the thread surface (≥hrc53) allows for a quick and secure connection without the need for prefabricated holes. This type of screw is characterised by low screwing torque and high locking performance, making it a reliable choice for connecting gypsum wallboards to metal keels.

They are also used for connecting wood to steel

Truss head self-tapping screws are versatile fasteners that can be used for connecting wood to steel. This application is particularly useful when working with thin metal plates, such as steel or saw plates. To connect wood to steel using these self-tapping screws, it is necessary to first create a threaded bottom hole in the steel plate. This can be achieved by drilling a pilot hole and then using the self-tapping screw to create the internal thread within the hole. The sharp threads of the screw enable it to tap into the steel, creating a strong and secure connection.

The process of connecting wood to steel using truss head self-tapping screws is straightforward. The wood piece can be positioned against the steel plate, and the screw is then driven through the wood and into the pre-drilled hole in the steel. The self-tapping nature of the screw means that it cuts its own thread into the steel as it is turned, creating a tight and secure joint between the two materials. This method of connection is often used in applications where a strong, permanent joint is required, such as in construction, furniture assembly, or automotive modifications.

One of the key advantages of using truss head self-tapping screws for wood-to-steel connections is their efficiency. The process of drilling and tapping the steel plate can be completed in a single step, saving time and improving construction efficiency compared to traditional drilling and tapping methods. Additionally, the large pitch and standardised dimensions of the screws ensure a secure and reliable fastening.

It is important to note that truss head self-tapping screws are available in various materials, including carbon steel, stainless steel, and zinc-plated options. When choosing the appropriate screw material, consider the environment in which the connection will be used. For example, stainless steel screws are ideal for outdoor applications or environments with high moisture levels due to their corrosion resistance.

When working with truss head self-tapping screws, it is essential to use the correct tools for assembly and disassembly. For slotted self-tapping screws, a slotted screwdriver is required, while cross-recessed self-tapping screws call for a cross-shaped screwdriver. Torx tapping screws, on the other hand, require the use of a hexagon flower wrench for proper installation and removal.

Frequently asked questions