Simpson #9 x 4" 305 SS Deck-Drive DWP Wood Screw, T20, Trim Head PACK:5 Lb How does the OU610 attach

How does the OU610 attach to the header

Do these screws require pre-drilling when installing into hardwood deck boards

Model Number: ECC5 1/4-6

SD10212R500: 500 Pk - includes Hex driver included

MPN: APVDJT1

Simpson #9 x 4" 305 SS Deck-Drive DWP Wood Screw, T20, Trim Head PACK:5 Lb How does the OU610 attachSimpson Deck Drive DWP Wood Screw in Type 305 Stainless Steel by Simpson is engineered for deck, dock, and general exterior wood fastening applications where reliable corrosion protection is essential. Featuring a trim head profile, T20 6 lobe drive, and sharp point tip, this #9 x 4" screw drives cleanly into wood decking, fascia, and trim boards with minimal splitting or surface damage. The Type 305 stainless steel construction resists rust and