As the first hanger type created by Simpson Strong-Tie, F-series hangers have proven their dependability over the decades. All F models are designed specifically for the panelized industry that uses jigs or similar devices for precision fabrication. Because of their expedited installation, the F-series are the most cost-effective top-flange hangers. F ZMAX® Galvanized Panelized Construction Hanger for 4×6 (Pack of 3000).