Audited Supplier
Hex Washer Head Bi-Metal Self-Drilling Screws
Product Overview
Hex Washer Head Bi-Metal Self-Drilling Screws are high-performance fasteners that combine stainless steel and carbon steel through a welding process. This unique construction offers the corrosion resistance of stainless steel while retaining the drilling power of carbon steel, making them ideal for high-end construction projects that demand both durability and efficiency.
Product Advantages
Superior Corrosion Resistance
The head and shank are made from 300-series stainless steel, ensuring excellent rust and corrosion resistance, even in harsh environments.High Drilling Efficiency
The drill tip is made from hardened carbon steel, enabling fast and precise drilling through metal surfaces without requiring pre-drilling, which improves installation speed.Multiple Coating Options
To enhance durability and longevity, the screws are available in two surface treatment options:- Zinc Plating - Provides standard corrosion resistance.
- Ruspert Coating - Offers superior anti-corrosion protection for extreme environments.
Internal Performance
High Strength and Ductility
The bi-metal construction offers both strength and flexibility, ensuring reliable fastening and reducing the risk of brittle failure under high stress.Hydrogen Embrittlement Resistance
The 300-series stainless steel composition makes the screw resistant to hydrogen embrittlement, increasing its reliability in demanding applications.
Hex Washer Head Bi-Metal Self-Drilling Screws offer a perfect balance of corrosion resistance and drilling strength, making them an essential fastening solution for high-end construction projects. Their bi-metal design, multiple coating options, and high durability ensure long-term performance and reliability in challenging environments.
| Classification | Requirements of Corrosion Resistance |
| Class 1 | General use in indoor application. AS2331.3.1 SST:72H |
| Class 2 | General use in outdoor applications with low levels of pollution. AS2331.3.1 SST:240H.DIN50018 KESTERNICH test: 5 Cycles |
| Class 3 | Outdoor use in mild industrial or marine environment.AS2331.3.1 SST:1000H. DIN50018 Kesternich test: 15 Cycles |
| Class 4 | Outdoor use in severe marine environment. AS2331.3.1 SST: 1500H. DIN50018 Kesternich test: 25 Cycles |
| Class 5 | Outdoor use in highly severe marine environment. The use of SUS 304/316 Bi-metal screws are highly recommended |
