Fastener Concrete Screw
GRK Fasteners Caliburn Concrete Screws
Heavy duty concrete and masonry fastening
Official Materials
Case-hardened carbon Steel with corrosion-resistant topcoat
Official Suggested Use
Heavy duty concrete and masonry fastening
Hero Heading
Heavy Duty Concrete and Masonry Fasteners
Hero Summary
Feature Summary
Aggressive Heavy-Duty Threads, CALIBURN™ XL, Star Drive Recess, Additional Features, Climatek™ Coating: Approved for use in treated lumber
Applications
Basement Framing and Sheds, Electrical and Plumbing Fixtures, Wood to Concrete Framing, Additional Applications
Model Comparison
4 models
19/64" x 2-3/4" 19/64" x 3-1/2" 19/64" x 5" | Specification | 19/64" x 2-3/4" | 19/64" x 3-1/2" | 19/64" x 5" | |||
|---|---|---|---|---|---|---|
| Model | 57774 | — | 57778 | 55778 | 57785 | — |
| drive | T-40 | — | T-40 | T-40 | T-40 | — |
| variant_note | — | — | ||||
| product_url | https://www.grkfasteners.com/grk-products/specialty-fasteners-and-accessories/caliburn-concrete-screw | — | https://www.grkfasteners.com/grk-products/specialty-fasteners-and-accessories/caliburn-concrete-screw | https://www.grkfasteners.com/grk-products/specialty-fasteners-and-accessories/caliburn-concrete-screw | https://www.grkfasteners.com/grk-products/specialty-fasteners-and-accessories/caliburn-concrete-screw | — |
Shared Specifications
All models| official_materials | Case-hardened carbon Steel with corrosion-resistant topcoat |
| official_suggested_use | Heavy duty concrete and masonry fastening |
| hero_heading | Heavy Duty Concrete and Masonry Fasteners |
| hero_summary | |
| feature_summary | Aggressive Heavy-Duty Threads, CALIBURN™ XL, Star Drive Recess, Additional Features, Climatek™ Coating: Approved for use in treated lumber |
| applications | Basement Framing and Sheds, Electrical and Plumbing Fixtures, Wood to Concrete Framing, Additional Applications |
| warranty_note | GRK warranty page; no line-specific term stated on the official product page. |