Fasteners
Screws
Simpson Strong-Tie
$10-$40 per boxConcrete Screws for Direct Masonry Anchoring
Concrete screws thread directly into pre-drilled holes in concrete, brick, and masonry block without requiring expansion anchors. They provide fast, reliable attachment of sill plates, brackets, and ledger boards to masonry surfaces.
Key Features
- Thread directly into concrete - no anchors needed
- Hardened steel cuts its own threads
- Removable and reusable holes
- Hex washer or flat head options
- Corrosion-resistant coating
Specifications
Material: Hardened carbon steel with ceramic coating | Diameters: 3/16in and 1/4in | Lengths: 1-1/4in to 6in | Drive: Hex washer or Phillips flat | Pilot: 5/32in or 3/16in
Best For
Sill plate anchoring
Ledger board to concrete
Bracket and fixture mounting
Electrical box fastening
Compatible Materials
Poured concrete
CMU block
Brick
Stone
Mortar joints
Pros & Cons
Pros
- ✓ No expansion anchors or epoxy needed
- ✓ Fast drill-and-drive installation
- ✓ Removable for repositioning
- ✓ Approved for structural sill plates
Cons
- ✗ Require hammer drill and masonry bit
- ✗ Hole depth is critical
- ✗ Can crack thin or old concrete near edges
Installation Tips
Drill pilot hole 1/2 inch deeper than screw penetration for dust. Use hammer drill with carbide masonry bit. Maintain 1-1/2in minimum edge distance.
Frequently Asked Questions
For 3/16in screws drill 5/32in pilot. For 1/4in screws drill 3/16in. Use carbide masonry bit with hammer drill.
Minimum 1 inch embedment, 1-1/4 to 1-3/4in preferred. Drill hole 1/2in deeper than screw penetration.