Power Pro #10 x 2-1/2-in Epoxy Exterior Wood Screws (240-Per Box) in the Wood Screws department at Lowes.com
Amazon.com: #15 x 2-1/2" Construction Lag Screw Exterior Coated Torx/Star Drive Heavy Duty Structural Lag Screw Far Superior to Common Lag Screws - Modified Truss Washer Head - 100 Screw Count :
Grip-Rite #8 x 2 in. Phillips Bugle-Head Coarse Thread Sharp Point Polymer Coated Exterior Screws (1 lb./Pack) PTN2S1 - The Home Depot
Structural Wood Screws, 10 x 3-1/2, AXIS Exterior, Star Drive, 51 pc Appx, 30186-29