| 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 |
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 |
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 |
0.25 |
0.25 |
0.25 |
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.
⚙️ Main Functions & Applications
✓ 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
What are the advantages of the hexagonal head on these screws?
The hexagonal head allows for higher torque application using a wrench or socket, reducing the risk of slipping or stripping compared to standard drive types.
Do I need to drill a pilot hole before using these screws?
No, these are self-drilling screws designed with a drill-point tip that creates its own hole as it is driven into the material.
What materials are suitable for these hexagonal self-drilling screws?
They are ideal for fixing thin metal plates, wood-to-metal applications, and general construction components in both indoor and outdoor environments.
How do I choose the right "ST" specification?
The "ST" number refers to the thread size. You should choose based on the thickness of the material you are penetrating and the required load-bearing capacity.
Are these screws resistant to corrosion?
Yes, the color galvanized coating provides a layer of protection against rust and environmental wear, making them durable for construction use.
Can these screws be used for automotive repairs?
Yes, they are commonly used in automotive component assembly due to their high stability and ease of installation with power tools.
Dongshuo Fastener
