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.
📊 Technical Specifications
| 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 / 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 |
🛠️ Key Functions & Applications
🏗️
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
❓ Frequently Asked Questions
QWhat 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.
QWhat 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.
QWhat thread sizes are available?
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.
QWhat sheet metal thickness is compatible with these screws?
The compatible sheet metal thickness varies by size. ST2.9 supports 0.7 mm to 1.9 mm, while ST6.3 supports up to 6 mm. Refer to the specification table for precise details.
QAre color galvanized screws suitable for outdoor use?
Yes. The color galvanized coating provides essential corrosion resistance, making these screws suitable for outdoor applications where exposure to moisture or varying weather is expected.
QCan hexagonal drill screws be reused after removal?
They are designed for frequent tightening and loosening. However, reusability depends on the material condition. For critical structural applications, using new screws is recommended.
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