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Simpson Strong-Tie®

4-Inch 5/16 Hex Strong-Drive SDWH TIMBER-HEX Screw

Mfg.#
SDWH19400DB-RP1
Sku#
3924289
  • Bold thread design provides superior holding power
  • Large washer head provides maximum bearing area
  • Size identification on all SDWH screw heads
  • 5/16-inch hex drive
  • SawTooth point ensures fast starts, reduces installation torque and eliminates the need for predrilling in most applications

* Estimated stock levels as of Sat, Apr 11, 2026. All items subject to prior sale. Prices may vary between stores and online. Please call ahead to confirm availability of items marked as Limited Stock.

Description

Strong-Drive SDWH Timber-Hex screws are designed for structural and general-purpose fastening applications where a hex-head drive is preferred. These screws are ideal for the contractor and do-it-yourselfer alike. The SDWH Timber-Hex is code listed in IAPMO UES ER-192 and meets 2018 and 2021 IRC® and IBC® code requirements for most common wood framing applications.

Specifications

General

Coating Double-Barrier
Color Tan
Color Family Brown / Beige / Tan
Drive Type 5/16 in hex
Head Diameter 0.650 in
Head Type Large Hex Washer
Pack Qty 1
Point Type SawTooth
Thread Length 2-3/8 in
Type Exterior Wood Screw

Dimensions

Length 4 in
Shank Diameter 0.195 in
Size 4 in

Label Information

Certification, Codes, Standards IAPMO UES ER-192, IRC, IBC

Manufacturing Details
The following information is subject to change without notice

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