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Color Galvanized Hexagonal Self-Drilling Screws - China Suppliers & Factory for Enhanced Fastening Solutions
| 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, and assembling mechanical and automotive components.
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 1.1mm to 1.8mm to suit various application requirements.
Q
Why is a hexagonal head design preferred for self-drilling screws?
The hexagonal head design allows for easier torque application using standard wrenches or torque wrenches. It provides a more secure grip, reduces the risk of slipping, and is less likely to break under high torque compared to other head designs.
Q
What is the maximum drilling depth for these screws?
The maximum drilling depth or sheet metal thickness varies by thread size. For example, ST2.9 supports up to 1.9mm, while ST6.3 supports up to 6mm. Please refer to the specification table above for detailed values per thread size.
Q
Are these screws suitable for frequent tightening and loosening?
Yes. The hexagonal self-drilling screw design is specifically suitable for applications requiring firm fixation as well as situations where repeated tightening and loosening is necessary, making them a reliable choice for long-term use.
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 and then given a colored finish. This provides enhanced corrosion resistance, improved durability, and a visually appealing appearance suitable for both functional and decorative applications.