Simpson Strong-Tie SDWH19400DB-R50 4" Structural Wood Screw -Exterior 50ct
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.
Key Features
- SawToothâ„¢ 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
Specifications:
| Coating/Material | Double-Barrier Coating |
| Length (in.) | 4 |
| Head Diameter (in.) | 0.640 |
| Shank Diameter (in.) | 0.195 |
| Drive Type | 5/16" Hex |
| Head Type | Large Hex Washer Head |
| Thread Length | 2 3/8 |
| Point Type | SawToothâ„¢ Point |
| Packaging Qty. | 50 |
