Caliburn XL Heavy-Duty Concrete Screw 19/64 in T-40 (25 Pack)

The GRK Caliburn XL is a heavy-duty concrete and masonry fastener engineered for high-performance anchoring without the need for traditional expansion anchors. Featuring a patented thread design and a large washer head, these screws provide superior holding power and high pull-out strength for demanding applications like basement framing and electrical fixture installation. The specialized Climatek coating ensures excellent corrosion resistance, making them suitable for both indoor and outdoor use in treated lumber. These fasteners are designed for efficiency, allowing for removal and reinsertion into the same pilot hole without damaging the threads or the substrate.

Caliburn concrete screws are professionally engineered fasteners with a patented thread design for ease of driving the screw in concrete and similar applications. Available in three different head styles for multiple applications. Caliburn, Caliburn PH and Caliburn XL are Climatek coated for high corrosion resistance. Caliburn's uncompromised draw and pull-out strength make it possible to be used in jobs which previously required an anchor. The screws aggressive thread design afford it the ability to be removed and reinserted into the same pilot hole numerous times without the concern of the fastener breaking or the threads wearing.