Description
The Self Tapping and Self Drilling Screws are high-performance industrial fasteners designed for maximum efficiency. Engineered from premium 410 stainless steel, these screws are specifically heat-treated to achieve the hardness necessary to penetrate metal surfaces without a pilot hole.
Complying with the DIN7504N standard, this screw features a specialized drill-point tip that drills, taps, and fastens in a single, seamless operation. The circular pan head with a precision cross-groove (Phillips) drive ensures a clean, professional finish and stable torque transmission. These stainless steel screws are the perfect solution for heavy-duty applications in construction, automotive assembly, and HVAC systems where speed and structural integrity are paramount.
Features & Benefits
- Durable 410 Stainless Steel Construction: Provides high hardness and strength with moderate corrosion resistance, ideal for mechanical and structural fastening applications. Exhibits high wear resistance and strong oxidation resistance, guaranteeing no rust in humid environments under normal conditions.
- Self-Tapping & Self-Drilling Functionality: Combines two functions in one screw - drills its own hole and forms threads simultaneously, eliminating the need for pre-drilling.
- Precision Threads: Deep, sharp, and uniform threading ensures consistent grip strength and secure fastening performance.
- Secure Drive: The standard cross groove drive and precise dimensions (meeting standards like DIN7504N) ensure a tight lock and prevent slippage during installation.
Specification
|
Specification |
M2.9 |
M3.5 |
M4.2 |
M4.8 |
M5.5 |
M6.3 |
|
Pitch -p |
1.4 |
1.3 |
1.4 |
1.6 |
1.8 |
1.8 |
|
Head diameter -dk |
5.5 |
6.8 |
7.9 |
9.3 |
10.8 |
12 |
|
Head thickness -k |
2.3 |
2.5 |
3 |
3.5 |
4 |
4.5 |
FAQ:
Q1: What is the difference between 410 and 304 stainless for these screws?
A: 410 stainless steel is magnetic and can be heat-treated to a high level of hardness, which is necessary for the screw to drill through metal. While 304 has better corrosion resistance, it is too soft to act as a drill bit for metal-to-metal applications.
Q2: Can these screws be used in outdoor marine environments?
A: 410 stainless is ideal for indoor or mild outdoor use. For high-salt or coastal marine environments, we recommend using 316-grade fasteners, though those usually require a pre-drilled pilot hole.
Q3: What thickness of metal can these self-drilling screws penetrate?
A: The drilling capacity depends on the screw size, but generally, DIN7504N screws are designed to handle sheet metal thicknesses ranging from 0.5mm to 4.0mm.
Q4: What is the advantage of combining self-drilling and self-tapping in one screw?
A: It allows the screw to drill its own hole and form threads in a single step, eliminating pre-drilling and significantly reducing installation time.
Q5: Are these screws reusable?
A: While they can be removed, reusability depends on the condition of the threads and the base material after installation.
