Double-Section Self-Tapping Screws

Product introduction

Double-section self-tapping screws are an efficient integrated fastener that adopts a unique double-section thread design and perfectly combines self-drilling and self-tapping functions. Its front end is a specially reinforced drill-type end, which can directly and quickly drill holes on various metal plates (such as steel plates, aluminum profiles) and non-ferrous metal materials without pre-punching or pilot holes, significantly improving assembly efficiency. The precision thread section that follows is responsible for simultaneously tapping matching complete threads in the drilled hole to form a strong and durable internal thread connection. With its integrated operation mode, this product combines the three steps of drilling, tapping and fastening in the traditional process into one, significantly saving construction time and labor costs. Its thread design combines high pullout force with excellent vibration resistance, ensuring that the connection point remains stable and reliable under dynamic loads. It is mainly widely used in thin plate connection scenarios in the fields of building steel structure enclosure systems, ventilation and air conditioning duct installation, mechanical equipment casings, auto parts, home appliance manufacturing and outdoor guardrails. It is an ideal solution to achieve efficient assembly and reduce overall costs.

 

Product features

1. Drilling and tapping are completed in one go: The front end of the screw is equipped with a high-strength drill bit, which can directly drill holes in metal plates and profiles without pre-drilling or pilot holes. The three steps of drilling, tapping and locking are integrated into one, which greatly improves assembly efficiency and saves working hours and labor costs.

2. Excellent connection strength and stability: Precision thread design and high-quality steel ensure a full-tooth, high-strength connection between the screw and the base material. Its threads have excellent pullout force and vibration resistance, which can effectively prevent loosening under dynamic loads.

3. Excellent material adaptability: Designed for connecting thin metal plates (such as steel plates, aluminum plates, non-ferrous metals), it can easily drill through base materials of a certain thickness (usually related to the screw diameter). Especially suitable for scenarios where different materials are fixedly connected.

4. High hardness and wear resistance: It is usually made of high-quality carbon steel and undergoes strict heat treatment processes (such as quenching and tempering) to make the drill bit part and thread surface have high hardness and wear resistance, ensuring smooth drilling through the metal and completing tapping to avoid screw wear or breakage.

5. Easy to install, cost-effective: It eliminates the cumbersome steps of drilling and tapping separately in traditional installation, simplifying the construction process. This not only reduces the requirements for operator skills, but also reduces the dependence on special drilling equipment, resulting in lower overall cost of use.

 

Product application

1. Construction and steel structure fields: Metal roof and wall systems: widely used to fix roof panels and wall panels such as colored steel tiles and aluminum-magnesium-manganese panels to the purlins of steel structures (such as C-shaped steel and Z-shaped steel). It is the core fastener of industrial plants, warehouses and other buildings. Outdoor facilities: used to fix guardrails, metal fences, anti-theft windows, etc., which can quickly penetrate profiles and form strong connections.

 

2. Ventilation, air conditioning and piping engineering: Specially used for air duct installation, it can easily drill through the galvanized iron air duct and its flange corner code, and firmly fix it on the boom or bracket. It has extremely high installation efficiency and good sealing.

 

3. Home appliances and chassis cabinet manufacturing: used in the assembly of sheet metal casings of household appliances (such as air conditioners, washing machines, water heaters), as well as the manufacturing of network cabinets, server cabinets, and electrical control boxes, for quickly fixing side panels, top panels, and internal structural parts.

 

4. Automobiles and transportation: In the manufacturing of passenger cars, trucks, and refrigerated carriages, it is used to connect interior panels, skins and frames, and is also suitable for fixing automobile parts (such as mufflers, heat shields).

 

5. Other industrial fields: It is widely used in the installation of outer covers of mechanical equipment, the connection and reinforcement of storage shelves, and any occasion where thin metal parts (usually the thickness is related to the diameter of the screw) need to be quickly fixed to the metal substrate.

 

FAQ

Q: What is the difference between double-section self-tapping screws and ordinary self-tapping screws?

A: The core difference is whether pre-drilling is required. Ordinary self-tapping screws: can only be tapped and tightened in pre-drilled or punched holes, and do not have drilling capabilities. Double-section self-tapping screws: The front end is equipped with a drill bit, which integrates the three functions of drilling, tapping and fastening. It does not require any pre-drilling when used, and can be installed directly on the metal plate, which is extremely efficient.

 

Q: What is its anti-corrosion performance?

A: It depends on its surface treatment process. Common choices are: Ordinary environment: Galvanizing (white zinc, colored zinc, blue and white zinc) is an economical and versatile choice. Outdoor or high humidity environment: It is recommended to use Dacromet (zinc chromium coating) treatment with better corrosion resistance.

 

Q: Can it be disassembled and reused?

A: Not recommended. Double-section self-tapping screws will cut exclusive threads on the base material when installed. Once disassembled, the original threads will be destroyed, and the same tightening force and anti-loosening effect will not be guaranteed when reinstalled, which may cause the connection to loosen. Therefore, it is usually designed as a single-use fastener.

Internal Plum Blossom-Shaped Pointed Screw

Hexagonal Hollow Fine Thread Screw

Carbon Steel Dacromet Eccentric Screws For Metal Joints

One-Slot Reverse Thread Screw

Stainless Steel Stepped Slotted Screw For Machinery Assembly

Color-Plated Cross Step Screws