| Thread specifications (d) |
ST2.2 |
ST2.9 |
ST3.5 |
ST4.2 |
ST4.8 |
ST5.5 |
ST6.3 |
| P |
Pitch |
0.8 |
1.1 |
1.3 |
1.4 |
1.6 |
1.8 |
1.8 |
| a |
Max |
0.8 |
1.1 |
1.3 |
1.4 |
1.6 |
1.8 |
1.8 |
| dk |
Max |
3.7 |
5.3 |
6.64 |
7.64 |
9.14 |
10.57 |
11.57 |
| Min |
3.4 |
5 |
6.28 |
7.28 |
8.78 |
10.14 |
11.14 |
| k |
Max |
1.6 |
2.4 |
2.6 |
3.1 |
3.7 |
4 |
4.6 |
| Min |
1.4 |
2.15 |
2.35 |
2.8 |
3.4 |
3.7 |
4.3 |
| dc |
h15 |
Max |
5 |
7 |
8 |
9 |
10 |
12.5 |
14 |
| Min |
4.52 |
6.42 |
7.42 |
8.42 |
9.42 |
11.8 |
13.3 |
| s |
Min |
0.3 |
0.5 |
0.8 |
0.8 |
0.8 |
1 |
1 |
| y |
Ctype |
2 |
2.6 |
3.2 |
3.7 |
4.3 |
5 |
6 |
| F/FTtype |
1.6 |
2.1 |
2.5 |
2.8 |
3.2 |
3.6 |
3.6 |
| Slot Number |
0 |
1 |
2 |
2 |
2 |
3 |
3 |
| M |
Ref |
1 |
3 |
3.9 |
4.4 |
4.9 |
6.4 |
6.9 |
| Insert depth/maximum |
0.85 |
1.4 |
1.4 |
1.9 |
2.4 |
2.6 |
3.1 |
| Insert depth/minimum |
1.2 |
1.8 |
1.9 |
2.4 |
2.9 |
3.1 |
3.6 |
The Cross galvanized flat head self tapping screw is a high-performance mechanical connecting component featuring:
🛡️
Excellent Fastening
Made of high-strength materials, effectively tightening components and maintaining long-term stability.
⚙️
Easy Installation
Special head design allows for quick assembly or disassembly using a standard screwdriver, saving time and effort.
🌊
Corrosion Resistance
Chemical surface treatment forms a protective oxide film, providing rust protection for use in harsh environments.
🧩
Simple Structure
Composed of optimized head, shaft, and threaded parts, ensuring ease of manufacture and reliable application.
🏗️
Wide Application
Ideal for mechanical equipment, building structures, furniture, electronics, and aerospace industries.
💪
Superior Strength
The flat head design enhances engagement with base materials, offering high load-bearing and shear resistance.
Frequently Asked Questions
What materials are these self-tapping screws suitable for?
These screws are designed for a variety of base materials including metal sheets, wood, and plastics, providing a secure and stable connection.
Do I need to pre-drill a hole before using these screws?
One of the primary advantages of these self-tapping screws is that they can often eliminate the need for pre-punching, especially in softer materials or thin metals.
What is the benefit of the galvanized finish?
The galvanized coating acts as a barrier against moisture and oxidation, significantly extending the life of the screw by preventing rust and corrosion.
Why choose a flat head over a round head?
The flat head allows for a larger contact surface with the material, which improves stability and provides a lower profile finish compared to round heads.
Are these screws available in different sizes?
Yes, as shown in our technical table, we offer a full range of thread specifications from ST2.2 to ST6.3 to meet various industrial needs.
How does the "cross" (Phillips) drive system help?
The cross-shaped head is designed to center the screwdriver automatically, reducing the risk of slipping and making high-torque tightening more efficient.
Dongshuo Fastener
