FastenMaster LedgerLok 0.305 In. x 5 In. Coarse Steel Hex-Head Ledger Board Fasteners (50 Ct. Box) - Town Hardware & General Store
Starborn Structural XF23CT400 F23 Deck Ledger/Multipurpose Flat Head Wood Screw - Black - 50 Count - 0.23" x 4": Amazon.com: Industrial & Scientific
17 X 4" Heavy Duty Structural Wood Screws - Exterior Coated Heavy Duty Wood Screws - Use for Fastening Ledger Boards, Large Timbers, Logs and More (50 Approx. Screw Count): Amazon.com: Industrial & Scientific