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LDT-3444 3/4 X 4-1/2 Large Diameter Thread Tapcon Anchor, Package Quantity: 50 per box Cuts it's Own Threads into Concrete Finished Hex Washer Head, with Anti-Rotation Serrations Anchor is Stamped with a Length Identification Code Use Standard Drill Bits UPC 610696433336 Brand ITW RED HEAD Color Silver Model LDT-3444 Set Name ITW RED HEAD Tapcon LDT-3444 Concrete Screw Set (50 Pieces) Head Type Hex Size Name 4.5 inches Metal Type Alloy Steel Unit Count 10.0 Count Item Weight 0.01 Ounces Part Number IRHLDT3444 Thread Size 3/4-inch Thread Type Ldt Drive System External Hex Finish Types Zinc Plated Grade Rating Grade 5 Manufacturer ITW Red Head Thread Class standard Thread Style self-tapping Fastener Size 0.75 inches x 4.5 inches Fastener Type Screw Item Diameter 0.75 Inches Material Type Carbon Steel Exterior Finish Zinc Thread Coverage Fully Threaded Number of Pieces 50 Screw Head Style Hex Screw Point Style Type A Point Set Screw Thread Type self-tapping Maximum Shear Strength 500-1500 lbf Compatible Groove Diameter 0.75 Inches