57778 SCREW CALIBURN 25PK 19/64X3-1/2 (25)pk
by Gap Power
SKU GRK57778
Original price
$52.00
-
Original price
$52.00
Original price
$52.00
$52.00
$52.00
-
$52.00
Current price
$52.00
In-Store Only — Visit us in Gap, PA to purchase
Overview
The GRK Fasteners Caliburn Concrete Screw (57778) is designed for anchoring and fastening applications in concrete, masonry, and similar substrates. Engineered by ITW Brands, this 25-pack of 19/64 in. x 3-1/2 in. screws delivers professional-grade holding performance in demanding construction environments where traditional anchors were previously required.
| MPN | 57778 |
|---|---|
| Brand | GRK Fasteners / ITW Brands |
| Size | 0.29 in. Diameter x 3.5 in. Length |
| Pack Quantity | 25 screws |
| Package Weight | 4.82 lb |
| Coating | Climatek |
| Certifications | ESR-3251 (concrete anchoring); AC257 code approved (treated lumber) |
| Head Style | Caliburn XL Washer Head |
| Color | Yellow |
Technical Features
- Patented thread design: Aggressive heavy-duty threads lock mechanically into concrete, enabling secure engagement with the substrate for high draw and pullout strength.
- Six-point contact drive system: Zero-strip design provides full torque transfer to the fastener head, reducing cam-out and driver bit wear during installation.
- Re-enterable pilot hole compatibility: Screws can be removed and reinserted into the same pilot hole multiple times without fastener breakage or thread degradation, reducing material waste on adjustable or temporary assemblies.
- Climatek corrosion-resistant coating: Provides high corrosion resistance and is AC257 code approved for use in treated lumber, expanding application suitability in both interior and exterior environments.
- ESR-3251 certified: Independently evaluated and approved for use in concrete anchoring applications, supporting use on code-compliant and engineered projects.
- Caliburn XL washer head design: Engineered for superior holding power, distributing clamping load over a larger bearing surface compared to standard head profiles.
- Anchor-replacement capability: Uncompromised draw and pullout strength allows substitution for traditional concrete anchors in qualifying applications, streamlining fastener selection on job sites.
Applications
- Direct fastening into concrete and masonry substrates
- Anchoring structural and non-structural components to concrete where ESR-3251 compliance is required
- Fastening into treated lumber in code-regulated applications (AC257 approved)
- Installations requiring removable and reinstallable fasteners without pilot hole damage
- Applications previously requiring mechanical concrete anchors