#7 x 1-5/8" Simpson Strong-Tie #1 Square Drive Trim Head Deck Screw - 316 Stainless, Pkg. 1 Lb. Bugle Head Collated Wood Deck Screws This Simpson Underlayment/Backerboard Attachment features

This Simpson Underlayment/Backerboard Attachment features a limited lifetime warranty (see manufacturer for specific details on warranty)

increasing connection strength and reducing the number of required fasteners

Made from stainless steel

reducing the risk of stripping during high-speed installs

#7 x 1-5/8" Simpson Strong-Tie #1 Square Drive Trim Head Deck Screw - 316 Stainless, Pkg. 1 Lb. Bugle Head Collated Wood Deck Screws This Simpson Underlayment/Backerboard Attachment featuresThe Simpson Strong Tie Trim Head Square Drive Wood Screw is built for decking applications where both strength and appearance matter. Designed with a low profile trim head that sits flush with the surface, it provides a clean, professional look while holding deck boards securely in place. A Type 17 point ensures fast starts, and coarse threads along the shank pull boards tightly to joists for a strong, lasting connection. Engineered for reliability,