#9 x 4" Simpson Strong-Tie T20 DWP Trim Head Wood Screw - 305 Stainless Steel, Pkg. 5 Lb. PA Purlin Anchors Zinc-plated for added corrosion resistance

Zinc-plated for added corrosion resistance in dry interior environments

Light-duty outdoor structures

each anchor features a serrated cutting thread and patented raised-rib design that eliminates the need for expansion

Metal roofing and siding installations

Corrosion Resistant: Class 55 Mechanically Galvanized finish meets ASTM B695 Class 55 requirements

#9 x 4" Simpson Strong-Tie T20 DWP Trim Head Wood Screw - 305 Stainless Steel, Pkg. 5 Lb. PA Purlin Anchors Zinc-plated for added corrosion resistanceThe Simpson Strong Tie Deck Drive DWP Trim Head Wood SS Screw is built for outdoor projects that demand long lasting performance and a clean finish. Made from 305 stainless steel for reliable corrosion resistance, its the go to fastener for decks, docks, fences, and other exterior wood applications. Engineered for efficiency, this screw features a sharp point and unique box thread design that drive smoothly into wood, engineered lumber, and polymer