Hexagonal Head Self-Tapping Screw

Product introduction

Hexagon head self-tapping screws are a type of fastener that combines convenient installation with strong connection force. Its head adopts a standard hexagonal head design, which can be tightened with a wrench or socket. It provides much greater torque than cross recess or slot recess, making it easy to apply preload force and operating efficiently even in narrow spaces. The core advantage of this product is its self-tapping capability. The ends of screws are usually tapered and equipped with sharp cutting grooves or self-drilling tips. They can directly extrude and cut matching threads in metal, plastic, wood and other materials without tapping or drilling pilot holes on the base material in advance (for thinner sheets). This not only simplifies the assembly process and greatly improves production efficiency, but also forms a firm thread engagement to ensure reliable connection. Mainly used in sheet metal connection, steel structure fixing, mechanical and electrical equipment assembly, auto parts, outdoor guardrails, color steel tile installation and other fields. It is characterized by good anti-loosening performance, high connection strength and convenient installation. It is an indispensable and efficient fastening solution in modern industrial manufacturing and construction industries.

 

Product features

1. Easy installation and strong torque: The unique hexagonal head design can be tightened using wrenches, sockets and other tools. It can withstand a tightening torque much greater than that of ordinary pan head or countersunk head screws. The installation is more labor-saving and the tightening is stronger. It is especially suitable for use in situations where high pre-tightening force is required or space is limited.

 

2. Self-tapping drilling, efficient and time-saving: The front end of the screw is equipped with a sharp multi-functional drill bit (self-drilling tip), which can directly drill, tap and lock on metal plates, profiles and other base materials in one go. There is no need to pre-punch or tap holes, which greatly simplifies the process and significantly improves assembly efficiency.

 

3. Firm connection and reliable anti-loosening: Internal threads that perfectly match its own threads are formed by extrusion or cutting, achieving high-strength thread engagement. This tight fit effectively resists vibration and looseness, ensuring a long-term, stable and safe connection.

 

4. Strong versatility and diverse materials: suitable for connecting a variety of thin-walled metal materials (such as steel plates, aluminum, color steel tiles), wood and engineering plastics. Products are usually made of carbon steel, stainless steel and other materials, and can be equipped with surface treatments such as galvanizing and Dacromet to meet different strength and corrosion resistance requirements.

 

Product application

1. Connection between metal sheets and steel structures: This is its most classic application field. It is widely used in the installation of color steel tile roofs, metal workshops, and light steel structure buildings. It can directly penetrate thin steel plates and be fixed on the steel beams or purlins behind them without pre-drilling.

 

2. Installation of outdoor facilities and guardrails: often used for fixing outdoor guardrails, anti-theft windows, metal fences, and ventilation ducts. Its strong drilling capacity and anti-vibration performance ensure the long-term stability of these exposed structures.

 

3. Assembly of mechanical equipment and electrical shells: used for the assembly of chassis cabinets, control boxes, and sheet metal shells. The hexagonal head design facilitates fast and large-volume tightening using power tools, and can withstand certain vibrations to prevent equipment from loosening during operation.

 

4. Automobile and transportation: In the manufacturing and maintenance of automobile bodies, truck compartments, and containers, it is used to fix metal skins, interior parts, or wire ducts, etc.

 

5. Hybrid connection of wood and metal: It can be used to fix metal connecting parts (such as corner codes, brackets) to wooden structures, such as in wooden construction or furniture manufacturing.

 

FAQ

Q: What is the reason why the screw cannot be screwed in, slips or breaks?

A: Excessive torque: When using power tools, the torque setting is too high, or the force arm applied is too long, causing the screw torque to exceed the limit and break. Please adjust the torque and use appropriate tools. Misalignment or forced entry: The screw is not driven vertically, or it encounters a hard point and is driven in forcefully, causing stress concentration and breakage. Improper selection: The drill bit part of the screw is not long enough or has insufficient performance to penetrate the thickness of the substrate and needs to be replaced with a stronger model.

 

Q: What should I do if the drill bit part of the screw cannot "bite" the material and cannot start drilling?

A: Insufficient initial pressure: In the initial stage, sufficient axial pressure needs to be applied to ensure that the drill tip is stable on the material surface and prevent "deviation". The rotation speed is too low: When starting to drill, you need to use a higher rotation speed to facilitate the drill tip to penetrate quickly. Drill tip wear: Check whether the screw drill tip is worn or dull and needs to be replaced with a new one.

 

Q: Why is the connection still loose after tightening the screws?

A: The hole diameter is too large: It may be that the diameter of the pre-drilled hole (if necessary) is too large, or the base material is too thin, resulting in insufficient engagement turns between the screw thread and the base material to form an effective grip. Wrong selection: The length of the screw is not enough, the thread cannot completely penetrate all the connected layers, or the diameter of the screw is too small. Material issues: If the base material is plastic or cork, it may gradually loosen due to creep or extrusion deformation.

 

Q: Why is the connection still loose after tightening the screws?

A: The hole diameter is too large: It may be that the diameter of the pre-drilled hole (if necessary) is too large, or the base material is too thin, resulting in insufficient engagement turns between the screw thread and the base material to form an effective grip. Wrong selection: The length of the screw is not enough, the thread cannot completely penetrate all the connected layers, or the diameter of the screw is too small. Material issues: If the base material is plastic or cork, it may gradually loosen due to creep or extrusion deformation.

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