Product Introduction
The Zinc Aluminum Alloy Cap Screw (ZAMAC Cap Screw) combines a ZAMAK 5 zinc-aluminum alloy cap with a self-drilling or self-tapping screw, offering outstanding corrosion resistance and durability.

It is ideal for construction, metal assembly, and industrial fastening applications, with customizable sizes and specifications available upon request.
Product Features
  • Available in self-drilling or self-tapping screw options
  • ZAMAK 5 alloy cap, 5/16" in size
  • Custom screw specifications: #12 × 1" to 3"
  • Comes with an EPDW washer for enhanced sealing and waterproof protection
  • Excellent corrosion resistance, ideal for outdoor and humid environments
Material
  • Cap: Zinc Aluminum Alloy (ZAMAK 5)
  • Screw: Carbon Steel or Stainless Steel (optional)
  • Washer: EPDW Washer
Product Advantages
  • Superior corrosion and weather resistance for extended service life
  • Smooth and refined surface for better visual appeal
  • Easy installation that reduces labor and time costs
  • Flexible customization in size and threading options
  • Suitable for a wide range of construction and industrial uses
Application Industry
  • Construction Industry – roofing, wall cladding, and steel structures
  • Metal Fabrication – sheet metal fastening and frame connections
  • Industrial Assembly – equipment and machinery installation
  • Architectural Hardware – interior and exterior fitting projects
Why Choose Us
As a professional zinc aluminum cap screw manufacturer, we specialize in OEM & ODM metal fastener solutions.

Our screws are precisely engineered for high performance, corrosion resistance, and long-lasting reliability — perfect for industrial and construction projects worldwide.