SIMPSON Strong-Tie, 1/4in. x 1-3/4in. Flat-Head Concrete Screw, Blue, Included (qty.) 100, Model# TNT25134TF

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- Torque Reduction Channel that traps dust where it can’t obstruct the thread action, reducing the likelihood of binding in the hole (patent pending)
- Code listed in accordance with ICC-ES AC193 for concrete applications without cleaning dust from predrilled holes (IAPMO UES ER-712)
- Serrated screw point for easier starts when fastening wood
- Matched-tolerance bit not required; use a standard ANSI drill bit for installation
- Zinc plated with a baked-on ceramic coating
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