Free Shipping

on orders over $99

Worry-free Returns

365 day return policy


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
Starhead Bit By GRK Fasteners - #10 - 2 in - 2 pack
Starting at: $7.99
Concrete Drill Bit For GRK Fasteners
Starting at: $16.99
Post Anchor by Titan - 6x6 - with Hardware - Package Contents
Starting at: $22.99
General Purpose Structural Post with Angle Adjustment
Starting at: $44.99
Blu Mount Structural Post with Angle Adjustment by LMT Mercer
Starting at: $60.99
Reverse Thread (RT) Composite™ Trim Head Screws By GRK Fasteners - #8 x 2 in - 725 Pro Pack
Starting at: $78.99
RSS Rugged Structural Screws By GRK Fasteners - 3/8 in x 6 in - 50 Pro Pack
Starting at: $21.99
Simpson Strong-Tie Concrete and Masonry Screw
Starting at: $57.99
H23 Ledger/Multipurpose Structural Wood Screws by Starborn
Starting at: $20.38
Starborn F23 Structural Screws for Deck Ledger
Starting at: $20.38

Reviews & Questions