Simpson Strong-Drive® SD Connector Screw | Coated
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The Strong-Drive SD Connector screw is specifically designed to replace nails in certain Simpson Strong-Tie connectors and is the only screw approved for that application. The load-rated SD screw has been tested and approved for use in many popular Simpson Strong-Tie products. In certain applications screws are easier and more convenient to install than nails, and the single-fastener load values achieved by the SD screw exceed those of typical 10d common or 16d common nails. In addition, the galvanized coating makes the SD screw ideal for interior and most exterior conditions.
Key Features
- Specifically designed to replace nails in certain Simpson Strong-Tie connectors and is the only screw approved for that application. The #9 and #10 SD screws replace 10d and 16d nails, respectively.
- Tested and approved for use in many of our most popular connectors for both interior and exterior applications.
- Ideal for use in connector applications where more control is desired or using a hammer is inconvenient.
- 1/4" hex head with 0.370"-dia. integrated washer is stamped with the Simpson Strong-Tie "≠" sign and the fastener size for easy identification after installation.
- Shank is specifically designed to match the fastener holes in Simpson Strong-Tie connectors.
- Optimized heat treating for ductility and strength.
- The single-fastener load capacity of the SD9 exceeds the capacity of a 10d common nail, while the single-fastener load capacity of the SD10 exceeds that of the 16d common nail.
- Hex driver included.
Mechanically galvanized coating meets ASTM B695 Class 55, is recommended for use with certain preservative-treated woods and recognized as an alternate to hot-dip galvanized in ESR-3046; it is compliant with the 2012 International Residential Code®.
Types of Coated Screws
Hot-Dip Galvanized
Hot-dip galvanizing involves dipping steel fasteners in a bath of molten zinc, creating a uniform coating that provides excellent protection against corrosion. The process involves a metallurgical reaction between the iron in the steel and the molten zinc, resulting in a tightly bonded zinc-iron alloy coating with a pure zinc outer layer.
Mechanical Galvanized
Mechanical galvanizing is a room-temperature process that involves tumbling metal parts in a drum filled with zinc powder, glass beads, and corrosion-inhibiting chemicals. The glass beads peen the zinc onto the surface of the part, creating a durable coating. This process is suitable for small fasteners with fine threads that cannot be hot-dipped.
Quik Guard® Coated
Quik Guard® is a proprietary coating system developed by Simpson Strong-Tie. It consists of an electroplated zinc base layer with multiple organic top coats. The corrosion resistance of Quik Guard is equivalent to hot-dip galvanization in some exposures and non-marine environments.
Benefits of Coated Screws
- Improved corrosion resistance.
- Increased durability and lifespan.
- Cost-effective alternative to stainless steel screws.
- Available in a range of coating options and colors to suit different project requirements.
- Suitable in a variety of applications and materials.
Common Uses
- Decks, fencing and outdoor construction where extremely high corrosion resistance is not required.
- Indoor furniture making and interior construction.
- Applications where a lower-cost alternative to stainless steel screws is desired.
- DIY projects, such as treehouses, play yards, or birdhouses.
- Custom pallets, formwork and temporary applications where the lifespan of the project is limited.
Why Use Coated Screws?
Corrosion Resistance
Provides an extra layer of protection against corrosion and rust
Outdoor Versatility
Ideal for most outdoor projects in moderate climates.
Material Compatibility
Can be used in a variety of applications, including pressure-treated lumber,
composite decking, and cedar.
Cost-Effective
Offers a cost-effective alternative to stainless steel screws.
Customizable Options
Available in a range of colors to suit different project requirements
When to Use Which Grade?
Hot-Dip Galvanized
- For projects that require good corrosion resistance where conditions are not extreme.
- Ideally suited as a coating to protect heavy bolts and spikes.
- A good option where the screw will be in contact with pressure-treated lumber.
Quik Guard® Coated
- In areas with moderate exposure to moisture and salt.
- Due to the range of colors available, this option is very popular when installing composite decks.
Mechanical Galvanized
- In areas with low to moderate exposure to moisture and salt.
- For applications where the screw will be used in a dry or indoor environment.
- This is a very budget friendly option.