Simpson Strong-Tie SDWH19400DB 4" Length 0.640" Head Diameter 0.195" Shank Diameter 5/16" Large Hex Washer Head 2-3/8" Thread Length SawTooth™ Point Double-Barrier Coating Strong-Drive® SDWH TIMBER-HEX Screw (800 ct)

Ideal for structural and general-purpose fastening applications where a hex-head drive is preferred. The Strong-Drive SDWH Timber-Hex screw 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.

Features

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 that offer greater control when seating the head

Large washer head provides maximum bearing area (0.64" head dia.)

Size identification on all SDWH screw heads

5/16" hex drive (replacement driver bit — BITHEXR516-134)

U.S. Patent 9,523,383

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.

Applications

Structural wood-to-wood and engineered wood connections including ledgers

Product Includes

Retail and mini-bulk packs include one 5/16" hex driver bit; bulk packs include two driver bits