Simpson Strong-tie Strong-drive No. 3 Sizes X 3-1/2 In. L Star Hex Head Serrated Structural Screws

Discover the Simpson Strong‑Tie SDS Connector Screw, a robust 1/4" × 3-1/2" fastener engineered for demanding structural applications. Each screw features a precision‑machined Strong‑Drive head and a durable DB (double‑black) coating that resists moisture, chemicals, and UV exposure, ensuring long‑term performance on both indoor and outdoor projects.

Why choose this heavy‑duty connector screw? Its reinforced shank delivers superior withdrawal resistance, making it ideal for securing beams, joists, and metal framing. The DB coating adds a corrosion‑protective barrier, reducing maintenance costs and extending the lifespan of your construction work.

• Strong‑Drive Thread Design: Provides maximum torque transfer and minimizes cam‑out, perfect for high‑stress connections.
• 1/4" Diameter, 3-1/2" Length: Optimized dimensions for deep penetration into wood, steel, or engineered lumber.
• DB Coating Finish: Double‑black, corrosion‑resistant coating that stands up to harsh weather and chemical exposure.
• Heavy‑Duty Construction: Reinforced shank and hardened tip deliver exceptional pull‑out strength for structural fastening.
• Convenient 25‑Piece Pack: Bulk quantity reduces re‑ordering time and supports large‑scale projects efficiently.

Elevate your building projects with confidence: The Simpson Strong‑Tie SDS Connector Screw combines industry‑leading strength, durability, and corrosion protection in a single, easy‑to‑install fastener. Whether you’re framing a commercial warehouse or reinforcing a residential deck, this screw offers the reliability you need to meet code requirements and exceed client expectations. Choose the pack of 25 for uninterrupted workflow and superior structural integrity.