Sheet Metal Screw, #12 x 1-1/4 in, Zinc Plated Steel Flat Head Square Drive, 20 PK Sheet metal screws make excellent fasteners for attaching metal hardware to wood because the fully threaded shank provides good retention in wood..
.5/16"-18 x 1-1/2" Hot Dip Galvanized Grade 2 / A307 Steel Coarse Thread Carriage Bolts 15PK The square section grips into the part being fixed (typically wood), preventing the bolt from turning when the nut is tightened.