FastenMaster FMFL412-50 FlatLOK 4-1/2" Structural Multi-Ply Screws | 50 ct Box

Fastenmaster FMFL412-50

•Structural Screw for Multi-Ply Connections - Ideal for fastening LVL, girder trusses, and multi-ply lumber beams
•TORX ttap Drive System - Stability button provides maximum bit engagement and a wobble-free drive for smoother installation
•ICC-ES AC233 Code Compliant - Tested and approved structural performance backed by Technical Evaluation Report TER 1501-10
•Guaranteed Corrosion Resistance - Long-term protection for exterior structural applications when installed per FastenMaster guidelines
•Single-Sided Installation Approved - Eliminates through-bolts and reduces labor time while maintaining high structural integrity
•Lifetime Project Guarantee - Performance and corrosion resistance guaranteed for the life of the project (not for use within 1000 ft of saltwater)

Fastenmaster FMFL412-50

FastenMaster FlatLOK is a high-performance structural wood screw engineered for fastening multi-ply LVL, girder trusses, and multi-ply lumber beams with strength, speed, and reliability. Designed for demanding load-bearing applications, FlatLOK delivers code-compliant performance backed by ICC-ES AC233 testing and the FastenMaster Technical Evaluation Report (TER 1501-08).

The advanced TORX ttap Drive System features a stability button that locks into the fastener for maximum engagement and a wobble-free drive, ensuring smooth, consistent installation even in dense engineered lumber. FlatLOK also provides guaranteed corrosion resistance through its specialized coating, making it ideal for exterior structural applications when installed according to FastenMaster guidelines.

Approved for single-sided installation, FlatLOK eliminates the need for through-bolts and reduces labor time while maintaining exceptional structural integrity. When used as directed, FlatLOK is guaranteed to perform for the life of the project. (Not recommended for use within 1000 feet of saltwater.)