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Color Galvanized Hexagonal Self-Drilling Screws - Top Quality from China Suppliers and Factory
| 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.
Its Function
1
Fixation of Thin Plate Materials for Simple Buildings
2
Building structure reinforcement and support
3
Building Decoration Fixation
4
Mechanical equipment fixation
5
Automotive component assembly
6
Installation in the construction industry
Frequently Asked Questions
Q
What are color galvanized hexagonal self-drilling screws used for?
Color galvanized hexagonal self-drilling screws are widely used in carpentry, metalworking, and construction. They are ideal for fixing thin plate materials, reinforcing building structures, securing decorative elements, assembling mechanical equipment, and installing components in the automotive and construction industries.
Q
What thread specifications are available for hexagonal self-drilling screws?
These screws are available in thread specifications ST2.9, ST3.5, ST4.2, ST4.8, ST5.5, and ST6.3, with pitch values ranging from 1.1mm to 1.8mm depending on the size selected.
Q
Why is a hexagonal head preferred over other screw head designs?
The hexagonal head design allows for easy tightening and loosening using standard torque tools such as a wrench or torque wrench. It provides better grip and is less likely to strip or break compared to other head designs, making it suitable for applications that require frequent adjustments.
Q
What is the drilling depth range for these self-drilling screws?
The drilling depth or sheet metal thickness varies by screw size. For example, ST2.9 supports a minimum of 0.7mm and a maximum of 1.9mm, while ST6.3 supports a minimum of 2mm and a maximum of 6mm. Please refer to the specifications table above for full details.
Q
What does "color galvanized" mean for these screws?
"Color galvanized" refers to a surface treatment process where the screws are coated with a layer of zinc combined with a colored finish. This provides enhanced corrosion resistance and improves the aesthetic appearance, making them suitable for both functional and visible installation applications.
Q
Can hexagonal self-drilling screws be used in automotive applications?
Yes, hexagonal self-drilling screws are suitable for automotive component assembly. Their strong clamping force, reliable fixation, and ease of tightening with torque tools make them a practical choice for securing parts in automotive manufacturing and repair environments.