9 x 3", 6 Lobe Proferred Max Drive Professional Decking & Outdoor Wood Screw, Bronze SKT Coated (300/Pkg.) | AFT Fasteners
Hillman #8 x 1-1/4 in. Premium Exterior Wood Screw, 75-Pack at Tractor Supply Co.
9 x 3 Power Pro™ Outdoor Wood Screw - Star Drive - Ceramic Coated - QC Supply
Hillman 48620 Stainless-Steel Star Drive Outdoor Wood Screws, 1.75" x #8, 1 Lb - Walmart.com
Simpson Strong-Tie Outdoor Accents 0.220 in. x 3-1/2 in. T40 6-Lobe, Low Profile Head, Black Structural Wood Screw (12-Pack) SDWS22312DBBRC12 - The Home Depot