The Simpson Strong-Tie SD10212R500 Strong-Drive SD Connector Screw is a #10 x 2-1/2 inch connector screw sold in a 500-count box for use with approved Simpson Strong-Tie connectors. This is a connector screw designed for fastening structural connectors to wood framing. Model Number: SD10212R500. If you want the convenience of driving screws instead of hand-driving nails in connector hardware, this is the fastener Simpson designed and approved for that job.

What matters here is not just the size. This screw is specifically designed to replace nails in certain Simpson Strong-Tie connector applications, and Simpson states that the #10 SD screw replaces 16d nails in approved uses. That makes it a practical choice for framing repairs, retrofit work, overhead fastening, and any spot where a hammer is awkward or you want cleaner control with a drill or impact driver. The single-fastener load capacity is stated to exceed that of a 16d common nail, so this is not a convenience substitute that gives up performance.

The head and shank design are what make this screw different from a generic wood screw. It uses a 1/4 inch hex head with an integrated washer measuring about 0.370 inch in diameter, which helps the screw seat properly in connector holes and gives the driver bit a more positive grip during installation. The shank diameter is 0.160 inch, and Simpson notes that the shank is specifically designed to match the fastener holes in its connectors. In plain terms, this screw is built around connector fit, not just wood penetration.

Thread geometry also tells you how this fastener is meant to work. Overall length is 2-1/2 inches, with 1-1/8 inches of thread and a sharp point. That partially threaded configuration helps pull the screw where it needs to go while leaving the smooth shank section suited to connector applications. It is a hand-drive screw with a hex drive, so installation is straightforward with the included hex driver and a compatible drill or impact driver.

For outdoor exposure and treated lumber considerations, the coating matters. This version uses a mechanically galvanized Class 55 coating. Simpson states that this finish meets ASTM B695 Class 55 and is recommended for use with certain preservative-treated woods, and it is recognized as an alternate to hot-dip galvanized in ESR-3046. That makes it a solid choice for interior work and many exterior framing and connector jobs where corrosion resistance is part of the decision.

On the jobsite, the big benefit is installation control. In tight corners, up on a ladder, or when working around existing framing, driving a connector screw is often easier than trying to get a full hammer swing. The hex head also makes identification easier after installation because the head is stamped for identification. That is useful when you are checking hardware during inspections, punch lists, or call-backs and need to confirm the right fastener was used.

Compatibility is simple and important: this screw is meant for use in many approved Simpson Strong-Tie connectors. It is not just a general wood screw and should be used where Simpson lists the SD connector screw as an approved fastener. If you are already using Simpson framing hardware and want a faster, more controlled connector fastening option, this fits that system directly.

Who should buy it? Framing crews, deck builders, remodelers, general contractors, and serious DIY users working with Simpson connectors. If your work regularly involves joist hangers, ties, and structural connector hardware, a 500-pack like this makes sense. If you only need a few screws for a one-off repair, it may be more box than you need, but for repeated connector fastening this is the right fastener for the right application.

Simpson Strong-Tie SD10212R500 Strong-Drive SD Connector Screw Gets the Connector Job Done Right

This is the screw you buy when you want approved connector performance without messing around with a hammer in awkward spots.

• Who it's for: Framing crews, deck builders, remodelers, and serious DIY users installing Simpson connector hardware in wood framing.
• Why it stands out: It is purpose-built for Simpson connectors, replaces 16d nails in approved uses, and gives you better installation control with a 1/4 inch hex head and integrated washer.
• Worth knowing: This is a specialty connector screw, not a generic construction screw. Use it where Simpson lists it as approved, and the 500-count box makes the most sense if you are doing repeated connector work.

• What does this screw replace? The #10 SD connector screw is designed to replace 16d nails in certain approved Simpson Strong-Tie connector applications.
• Is this for exterior use? Yes. The mechanically galvanized Class 55 coating is intended for interior and most exterior applications, and Simpson states it is recommended for certain preservative-treated wood uses.
• What tool interface does it use? It uses a 1/4 inch hex drive, and a hex driver is included.
• Can I use this like a regular wood screw anywhere? It is designed specifically for Simpson Strong-Tie connector applications. For best results, use it where Simpson lists the SD connector screw as an approved fastener.