0.220" x 10" Strong-Tie SDWS221000DB-R12 Timber Screw - Double Barrier Coating | Qty. 12 Roof Boots approved for certain exterior and

approved for certain exterior and treated wood uses

The anchors feature a positive set marking indicator at the top of the anchor

The bugle head profile ensures flush countersinking for a clean

HVAC ductwork and steel panel attachment

Built for maximum uplift resistance

0.220" x 10" Strong-Tie SDWS221000DB-R12 Timber Screw - Double Barrier Coating | Qty. 12 Roof Boots approved for certain exterior andSimpson Strong Tie SDWS Timber Screws (Exterior Grade) are your go to fasteners when strength and weather resistance matter. Ideal for outdoor framing, landscaping, or heavy duty builds, these structural wood screws help DIYers get pro level results without the need for pre drilling. Coated with a high performance Double Barrier finish, they resist corrosion from rain, moisture, and treated lumber. The large washer head adds serious clamping power,