316 Stainless Steel Simpson Strong-Tie SDWH Timber Screw Bolts.

Strong-Drive SDWS Timber SS Heavy-Duty Structural Fastener in Severe Corrosion–Resistant Type 316 Stainless Steel. Its Heavy-Duty 0.276"-Diameter Shank, SawTooth^™ Point and Flat Head Makes the SDWS Timber SS the Ideal Choice for use in Applications Such as Docks, Wharves, Piers, Boardwalks and Ledgers Where Strength and Severe-Corrosion Resistance are Critical.

• Fast Installation — No Predrilling, No Counterboring, No Heavy-Duty Equipment Needed.
• Greater Withdrawal Resistance Than Spikes.
• Patented SawTooth Point for Fast Starts and Less Driving Torque — Without Predrilling.
• Heavy-Duty 0.276"- Diameter Shank Provides Strength.
• Large 0.650"- Diameter Flat Head with Nibs Provides Load-Bearing Area and Seats Flush with Surface.
• Deep T50, 6-Lobe Recess for Secure Driving.
• Type 316 Stainless Steel Provides Corrosion Resistance Even in Severe Conditions.
• Mid-Shaft Knurl Aids in Torque Reduction.