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FastenMaster 5 in. FlatLOK Structural Wood Screw, 50-Pack offers a versatile solution for fastening multi-ply LVL, girder trusses, and multi-ply lumber beams. Designed with a TORX ttap drive system, these screws maximize bit fit to reduce stripping, increase stability, and minimize wobble during installation. Each box includes a free TORX ttap bit (T-40), making it convenient and cost-effective. These screws require no pre-drilling, saving valuable time and labor on the job. FlatLOK fasteners have been rigorously tested and meet manufacturers requirements for single-sided installation of multi-ply LVL, LSL, and PSL, though they are not intended for exterior deck ledger applications. Model Number: FMFL005-50