Zinc Plated Bi-Metal Self Drilling Screw

• Customization: Available
• Material: Carbon Steel
• Shape of Head: Hexagon
• Model NO.: Self Drilling Screw
• Surface Finishing: Zinc Plated
• Certification: ISO, GS, CE, FM
• Customized: Customized
• Head Mark: Available
• Metal: 304+435
• Colour: Base on Client Require
• Lead Time: 60 Days
• Head: Pan/Truss/C.S.K./ Wafer/Hex
• Thread: Bsd Thread/Double Thread
• Transport Package: Box+ Carton+ Pallet
• Trademark: DAHE
• Origin: China
• HS Code: 731814
• Production Capacity: 8000 Tons/ Year

Product Description

Product Description

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