Cold heading Service


Ningbo Teng Qi Fasteners Co., Ltd is a leading self drilling screw manufacturer in China. A self-drilling screw is a type of screw that combines the features of a drill bit and a screw. It is designed to drill its own hole as it’s driven into the material, eliminating the need for pre-drilling. This type of screw is commonly used in applications where you want to fasten materials together and create a hole simultaneously, such as in metal-to-metal or metal-to-wood connections.


The specifications of self-drilling screws can vary based on the type, size, and intended application. Here are some common specifications you might find when describing a self-drilling screw:

Product Name:Self drilling screw
Thread Diameter:Metric: ST 2.9-ST 6.3
Imperial: 2#-1/2”
Head Type:Hex, flat, oval, round, or countersunk heads.
Material:Steel, Stainless steel
Surface treatmentBlack Oxide Coating/Zinc Plating (Electroplating)/Hot-Dip Galvanizing/Mechanical Galvanizing/Dacromet Coating/Painting or Powder Coating
Manufacturing Process:wire drawing, cold heading, thread rolling, heat treatment, surface treatment
ApplianceLFurniture Assembly, Cabinetry, Decking, Framing, Trim and Molding, Joinery ,Woodworking Projects, Repair and Restoration ,Woodworking Jigs and Fixtures

The specifications you provide should be accurate and relevant to the specific self-drilling screw you’re describing.

Type of Self Drilling Screw:

There are several types of self-drilling screws available, each designed for specific applications and materials. Here are some common types:

1. Hex Head Self Drilling Screws: These screws have a hexagonal head, which provides a larger surface area for applying force during installation. They are commonly used in construction and metal-to-metal applications.

2. Pan Head Self Drilling Screws: Pan head screws have a flat top with rounded edges. They are often used when a low-profile head is desired, such as in sheet metal and wood applications.

3. Flat Head Self Drilling Screws: These screws have a flat head that sits flush with the surface of the material when installed. They are commonly used in woodworking and applications where a flush finish is important.

4. Bugle Head Self-Drilling Screws: Bugle head screws have a flat top with a tapered underside. They are frequently used in drywall applications, as the head sinks slightly into the material.

5. Countersunk Head Self-Drilling Screws: Countersunk head screws have a conical head that is designed to sit flush with the surface of the material when installed. They are often used in applications where a flush finish is important.

10. Lag Screw: Although not exclusive to wood, lag screws have coarse threads and are used to secure heavy objects to wood surfaces, often requiring pre-drilled pilot holes.

11. Decking Screw: For outdoor use, decking screws resist corrosion and include self-drilling tips and anti-camout ribs for easier deck installation.

12. Particle Board Screw: Featuring sharp, self-tapping threads, these screws cut into particle board and similar materials without pre-drilling.

13. Cabinet Installation Screw: Combining features like fine threads for wood grip and specific head types for furniture and cabinet installation, these screws are versatile.

14. Hex Head Wood Screw: These screws have a hexagonal head requiring a hex wrench or driver for installation. They offer strong torque and are often used in construction and woodworking.

Manufacturing quality control of self drilling screw:

In a world where connections matter, Ningbo Teng Qi Fasteners is more than just a fasteners supplier and manufacturer. We are architects of stability, builders of relationships, and champions of your success. From skyscrapers that reach for the sky to machines that power industries, our fasteners form the backbone of progress. When you choose Ningbo Teng Qi Fasteners, you choose unwavering quality, exceptional service, and a partner who understands that every bolt holds a piece of your vision.

Control MethodDetail
Material Inspection:Verify the material's composition, heat treatment, and quality upon receipt. Conduct metallurgical analysis to ensure the material properties meet the standards.
Process Control:Implement strict process control measures for heat treatment, machining, threading, and any other manufacturing steps. Maintain consistent process parameters to ensure uniform quality.
Inspection Points:Introduce inspection points at various stages of manufacturing to check for defects, dimensions, and quality. Inspect threading, dimensions, surface finish, and other critical parameters.
Sampling and Testing:Regularly sample products for testing, such as tensile testing, hardness testing, and metallurgical analysis, to ensure they meet the required specifications.
Thread Inspection:Thoroughly inspect threading using proper thread gauges to ensure accurate dimensions and fit with mating components.
Traceability:Implement a traceability system to track each fasteners journey from raw material to final product. This aids in accountability and recalls if necessary.