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Caliburn XL Concrete Screws by GRK Fasteners are professionally engineered fasteners for concrete and similar applications. They feature a patented thread design for ease of driving the screw. The Caliburn™ XL are Climatek coated for high corrosion resistance. They are designs for multiple applications with the recommended GRK Drill Bits.

Caliburn™ XL Concrete Screws by GRK Fasteners are easy to use. Simply pre-drill pilot hole with 1/4 Inch GRK Concrete Drill Bit, clear concrete dust from hole, and drive the screw with GRK #40 Starhead Bit.

DecksDirect # 5197
Drive TypeStar/Torx
Head TypeXL washer head
Screw Length2-3/4 in, 3-1/2 in, and 5 in
Screw Size19/64 in
Material TypeCase hardened steel with Climatek coating
Pack Size2-3/4 in: 25 pack
3-1/2 in: 25 pack and 400 bulk pack
5 in: 25 pack
Coverage Estimaten/a
Included Accessories25 pack: (1) 1/4 in Concrete Blitz Drill Bit, (1) #40 Starhead Bit
WarrantyGRK Limited Lifetime Warranty
OtherPre-drill with 1/4 Inch Concrete Drill Bit for GRK Fasteners
Drive screw with #40 Starhead Bit by GRK Fasteners
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