ELCO Aggre-Gator® 300 Series Stainless Steel Screws

ELCO Aggre-Gator® 300 Series Stainless Steel Screws

Aggre-Gator® Bi-Metal Fasteners: The corrosion resistance of 300 series stainless steel in a threaded concrete anchor

Owners, architects and, design engineers expect longer life cycles from buildings. Extended warranties and use of more sustainable materials add up to greater expectations for performance – from structural integrity to the purely aesthetic – of all building components.

The Solution: Aggre-Gator Bi-Metal Threaded Concrete Anchors

  • Made of 300 series (18-8) stainless steel alloy to provide unmatched corrosion resistance in your toughest applications
  • Fused and hardened steel tapping threads make installations easy and hold tight in block and poured concrete
  • Coated with silver-colored Stalgard® GB, a Galvanic Barrier to protect aluminum components from accelerated corrosion when in contact with 300 series stainless steel
  • Gimlet point provides quick starts, and makes Aggre‑Gator anchors an ideal choice for treated, wood-to-wood applications


  • Exposed anchoring/coastal/wet areas
  • Aluminum enclosures
  • Hurricane shutters/windows/awnings/thresholds
  • Curtain wall & window wall support anchors
  • Stone facade support
  • ACQ-treated wood

You won’t find a better, easier-to-install or more reliable 300 series stainless steel anchor for your toughest construction applications than Aggre-Gator bi-metal concrete anchors.



  • Bi-metal technology – 300 (18-8) stainless steel head and shank
  • Fused and hardened steel tapping threads and gimlet point
  • Alternating, hi-low notched thread profile
  • Silver-colored Stalgard GB coating
  • Hex washer head and TrimFit® flat head designs



  • Outstanding corrosion resistance
  • Long service life
  • High strength and ductility
  • Offers greater galvanic compatibility in dissimilar metal applications involving aluminum
  • Thread profile provides quick cutting and stability during installations
  • High in-place value over life of structures


The Ideal Solution:

  • Unmatched, multi-level corrosion resistance
  • Quick and easy installs into concrete or masonry
  • Perfect choice for exposed/wet areas/aggressive environments, such as coastal areas
  • High performance for your most critical applications