Simpson Strong-Tie Strong-Drive SDWS 0.220 In. x 4 In. T40 Timber (Exterior Grade) Screw (50-Count)

These screws are designed to be an easy-to-install, high-strength alternative to through-bolting and traditional lag screws for a wide range of fastening applications. Bold thread design provides superior holding power. Patented 4CUT tip to ensure fast start, and reduced installation torque eliminating pre-drilling in most applications. Large head provides maximum bearing area. Double-Barrier coating makes screw suitable for exterior and preservative-treated wood applications. Deep 6-lobe Star Drive reduces cam-out, making driving easier. Low-profile head design provides a clean look and less interference after installation. Installs best with a low-speed 1/2" drill motor with a T-40 bit (bit included in each package). Screw diameter 0.220" with deep 6-lobe drive.

• SawTooth point ensures fast starts, reduces installation torque and eliminates the need for predrilling
• Underhead nibs offer greater control
• Large washer head provides mmaximum bearing area
• Bold thread design provides superior holding power
• SawTooth point ensures fast starts, reduces installation torque and eliminates the need for predrilling in most applications
• Underhead nibs allow for head to drive flush to surface with reduced splintering
• Large washer head provides a large bearing area
• Size identification on all SDWS screw heads
• 6-lobe T40 drive provides positive engagement that makes the screw easy to drive and improves bit life (replacement driver bit BIT40T-134-R2)
• Double-barrier coating provides corrosion resistance equivalent to hot-dip galvanization, making it suitable for certain exterior and preservative-treated wood applications, as described in the evaluation report
• Structural wood-to-wood/engineered including ledgers; mass timber connections including CLT wall-to-wall, floor-to-floor, surface splines and lap joints