Designed to provide an easy-to-install, high-strength alternative to through-bolting and traditional lag screws. The Strong-Drive SDWS Timber Screw (Exterior Grade) is ideal for the contractor and do-it-yourselfer alike. It is code listed under IAPMO UES ER-192 and meets 2015 and 2018 IRC and IBC code requirements for several common wood framing applications.
Strong-Drive SDWS TIMBER Screw (Exterior Grade) — 0.220 in. x 8 in. T40
SawTooth point ensures fast starts, reduces installation torque and eliminates the need for predrilling in most applications
Bold thread design provides superior holding power
Underhead nibs offer greater control when seating the head
Large low-profile washer head provides maximum bearing area (0.75-in. head dia.)
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-RC)
Length: 8 in.
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.