Simpson Strong-Tie SDS Screw 1/4" x 3-1/2" (10-Pack)

The Simpson Strong-Tie SDS Screw is a high-strength, structural wood connector screw engineered to eliminate predrilling and speed up installation in a variety of wood-to-wood and engineered-wood applications. Featuring a precision Type-17 point and serrated threads, this heavy-duty connector screw drives smoothly with reduced torque and minimal splitting. Its corrosion-resistant, double-barrier coating and robust hex washer head make it an ideal choice for decking, framing, ledger attachments and other critical structural connections.

Whether you’re building a new deck, securing guardrails or fastening engineered wood products, these SDS screws deliver consistent performance, easy identification and long-lasting durability.

Key Features

• Thread diameter: 1/4"
• Length: 3-1/2"
• Type-17 point for no-pre-drill installation and minimal splitting
• Serrated threads for superior holding power
• 3/8" hex washer head with 0.500" integrated washer
• Head stamped with Simpson Strong-Tie logo and length for easy identification
• Carbon steel construction with corrosion-resistant double-barrier coating
• Pack of 10 screws

⚠️ WARNING: This product can expose you to chemicals including wood dust, known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.