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China Factory Suppliers of Color Galvanized Hexagonal Self-Drilling Screws for Stronger Fixation and Fastening
| Thread specifications | ST2.9 | ST3.5 | ST4.2 | ST4.8 | ST5.5 | ST6.3 | |
| P | Pitch | 1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| a | Max | 1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| dc | Max | 6.3 | 8.3 | 8.8 | 10.5 | 11 | 13.5 |
| Min | 5.8 | 7.6 | 8.1 | 9.8 | 10 | 12.2 | |
| c | Min | 0.4 | 0.6 | 0.8 | 0.9 | 1 | 1 |
| s | Maximum = nominal | 4 | 5.5 | 7 | 8 | 8 | 10 |
| Min | 3.82 | 5.32 | 6.78 | 7.78 | 7.78 | 9.78 | |
| e | Min | 4.28 | 5.96 | 7.59 | 8.71 | 8.71 | 10.95 |
| k | Maximum = nominal | 2.8 | 3.4 | 4.1 | 4.3 | 5.4 | 5.9 |
| Min | 2.5 | 3 | 3.6 | 3.8 | 4.8 | 5.3 | |
| kw | Min | 1.3 | 1.5 | 1.8 | 2.2 | 2.7 | 3.1 |
| r | Min | 0.1 | 0.1 | 0.2 | 0.2 | 0.25 | 0.25 |
| Drilling depth or sheet metal thickness | Min | 0.7 | 0.7 | 1.75 | 1.75 | 1.75 | 2 |
| Max | 1.9 | 2.25 | 3 | 4.4 | 5.25 | 6 | |
| LG (minimum) | - | - | - | - | - | ||
Hexagonal drill screws are commonly used in places where mechanical fixing is required, such as carpentry, metalworking, and construction work. Their hexagonal head design makes them easier to secure with torque tools, such as a wrench or torque wrench, and less likely to break than other head designs. This type of screw can be used where it is necessary to ensure a firm fixation and where frequent tightening and loosening is required.
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Its Function
- 🏗️ Fixation of Thin Plate Materials for Simple Buildings
- 🔧 Building Structure Reinforcement and Support
- 🏠 Building Decoration Fixation
- ⚙️ Mechanical Equipment Fixation
- 🚗 Automotive Component Assembly
- 🏢 Installation in the Construction Industry
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Frequently Asked Questions
Q
What are hexagonal self-drilling screws used for?
Hexagonal self-drilling screws are widely used in carpentry, metalworking, and construction. They are ideal for fixing thin plate materials, reinforcing building structures, assembling mechanical equipment, and automotive component assembly.
Q
What is the advantage of a hexagonal head design on drill screws?
The hexagonal head design allows for easier fastening with torque tools such as wrenches or torque wrenches. It provides a more secure grip, reduces the risk of tool slippage, and is less likely to break compared to other head designs — making it suitable for applications requiring frequent tightening and loosening.
Q
What thread sizes are available for hexagonal self-drilling screws?
These screws are available in a range of thread specifications including ST2.9, ST3.5, ST4.2, ST4.8, ST5.5, and ST6.3, with pitches ranging from 1.1 mm to 1.8 mm to suit various application requirements.
Q
What sheet metal thickness is compatible with these screws?
The compatible sheet metal thickness varies by screw size. For example, ST2.9 supports a minimum of 0.7 mm and a maximum of 1.9 mm, while ST6.3 supports up to 6 mm. Please refer to the specification table above for details on each size.
Q
Are color galvanized hexagonal self-drilling screws suitable for outdoor use?
Yes. The color galvanized coating provides corrosion resistance, making these screws suitable for outdoor applications including building construction, decoration fixation, and structural reinforcement where exposure to moisture or varying weather conditions is expected.
Q
Can hexagonal drill screws be reused after removal?
Hexagonal drill screws are designed to allow frequent tightening and loosening. However, reusability depends on the material they are fastened into and the condition of the threads after removal. For critical structural applications, it is generally recommended to use new screws upon reinstallation.