Key Features
Nail Replacement The Simpson Strong-Tie SD9112MB Strong-Drive SD Connector Screw is built to replace 10d common nails in approved Simpson Strong-Tie connectors. That gives you a code-recognized fastening option when you want more control than swinging a hammer. Fast, Controlled Install A 1/4 inch hex head and included hex driver make these connector screws easy to run with a drill or impact driver. That matters in tight corners, overhead work, and spots where a hammer is awkward. Connector-Specific Fit The shank is sized to match Simpson Strong-Tie connector holes, and the mechanically galvanized Class 55 coating is approved for interior and many exterior connector applications. You get the right fit and the corrosion protection this kind of hardware needs.
Overview
The Simpson Strong-Tie SD9112MB Strong-Drive SD Connector Screw is a #9 x 1-1/2 inch connector screw made for fastening approved Simpson Strong-Tie metal connectors to wood framing. This is a hand-drive connector screw designed for installing Simpson Strong-Tie connectors where you want better control, easier access, and a faster install than nails in certain approved applications. Model Number: SD9112MB.
What makes this screw matter is simple: it is not just a generic wood screw. Simpson designed the SD connector screw specifically as a nail replacement in certain connector installations, and for the #9 version, the single-fastener load capacity exceeds that of a 10d common nail. If you are working with hangers, ties, and other connector hardware, that approval is the whole point. It gives builders and remodelers a fastener matched to the connector instead of improvising with whatever screw is on the truck.
The size and geometry are tuned for this job. The SD9112MB uses a #9 shank, a 1-1/2 inch overall length, a 0.370 inch integrated washer head, and a shank diameter sized to fit connector holes properly. That means cleaner seating in the hardware, more consistent installs, and less of the slop you get when a fastener was not really built for structural connector work. The sharp point also helps it start cleanly in framing lumber without extra fuss.
Installation is one of the biggest advantages here. The 1/4 inch hex head gives you a positive drive that is easy to hold on the bit, especially when you are working overhead, inside a corner, or between framing members where a hammer swing is limited. That is why these are popular for connector fastening in remodel work, deck work, roof framing details, and any spot where you need to place fasteners accurately without fighting the tool angle. Simpson also includes a hex driver, so you can get started without hunting down the right bit.
Durability is handled through optimized heat treating for ductility and strength, along with a mechanically galvanized Class 55 coating. In practical terms, that gives the screw the toughness needed for connector installs while adding corrosion resistance for interior and many exterior applications. Simpson specifically calls out this coating as meeting ASTM B695 Class 55, and it is recognized for use with certain preservative-treated woods and as an alternate to hot-dip galvanized in ESR-3046. If coating compatibility matters on your job, that is the kind of detail you want spelled out.
This screw also helps with identification after installation. The head is stamped with the Simpson Strong-Tie symbol and the fastener size, which makes it easier to verify what was installed when you are inspecting finished hardware or revisiting a job later. That may sound minor, but on structural hardware, being able to quickly confirm the correct fastener was used is a real advantage.
The Simpson Strong-Tie SD9112MB Strong-Drive SD Connector Screw is a good fit for framers, deck builders, general contractors, remodelers, and serious DIY users working with Simpson Strong-Tie hardware. If you are installing approved connectors and want a purpose-built screw instead of driving nails by hand, this is the right kind of fastener. If you just need a general wood screw, this is not that. It is a connector screw, and that connector-specific design is exactly why it earns its keep.
Better Control in Tight Connector Installs
This is where a connector screw earns its place. Instead of trying to swing a hammer in a cramped spot, you can drive the fastener cleanly with a drill or impact driver and keep the bit engaged the whole time.
- 1/4 inch hex head for secure bit engagement during installation
- Designed for approved Simpson Strong-Tie connector applications
Built to Match the Connector
Generic screws are not the move for structural hardware. The SD connector screw uses a shank and head design made to work with Simpson Strong-Tie connector holes, so the fastener seats the way it is supposed to.
- 0.370 inch integrated washer head helps distribute load at the connector face
- 0.130 inch shank diameter is sized for the intended hardware fit
Corrosion Resistance for Interior and Many Exterior Jobs
The mechanically galvanized Class 55 coating is there for a reason. Connector fasteners live against metal hardware and framing lumber, so finish and approval matter just as much as drive style.
- Mechanically galvanized Class 55 coating meets ASTM B695 Class 55
- Recognized for interior and many exterior connector applications
What’s in the Box
- (3000) Simpson Strong-Tie SD9112MB #9 x 1-1/2 in. Strong-Drive SD Connector Screws
- (1) Hex driver
Key Specifications
| Fastener Type | Hand-Drive Screw |
|---|---|
| Screw Size | #9 |
| Length | 1-1/2 in. |
| Drive Type | 1/4 in. Hex |
| Head Type | Hex Head with integrated washer |
| Head Diameter | 0.370 in. |
| Shank Diameter | 0.130 in. |
| Thread Length | 1-1/8 in. |
| TPI | 8.5 |
| Point Type | Sharp Point |
| Coating | Mechanically Galvanized, Class 55 |
| Piece Count | 3000 |
| Weight | 21.9 lbs |
Compatibility
Connector System Designed for approved Simpson Strong-Tie connectors and tested as a nail replacement in certain applications. Driver Interface Uses a 1/4 inch hex drive, so it installs with the included hex driver and common hex-drive tools. Treated Wood Use Mechanically galvanized Class 55 coating is recommended for use with certain preservative-treated woods per Simpson Strong-Tie guidance.
Built For
Construction Carpentry Deck Framing Roof Framing General Contracting Remodeling Connector Installation DIY / Hobbyist
Pro Tip
If you are switching from hand-driven nails to the SD9112MB, keep the driver straight to the connector face and let the integrated washer head seat fully without overdriving. That gives you a cleaner install and makes it easier to verify the head stamp after the job is done.
Tool Nut’s Take
Tool Nut’s Take
Simpson Strong-Tie SD9112MB Strong-Drive SD Connector Screw Gets the Connector Job Right
If you are fastening approved Simpson hardware, this is the kind of screw you buy once and stop second-guessing.
- Who it’s for: Framers, deck builders, remodelers, and serious DIY users installing Simpson Strong-Tie connectors.
- Why it stands out: It is purpose-built as a connector fastener, not a generic wood screw, with approved nail-replacement performance, a 1/4 inch hex head, and Class 55 galvanized protection.
- Worth knowing: This is a 3000-count box of #9 x 1-1/2 inch screws. Great if you burn through connector hardware regularly, probably overkill if you only have one small repair.
Common Questions
- What is this screw designed to replace? The #9 SD connector screw is designed to replace 10d common nails in certain approved Simpson Strong-Tie connector applications.
- Can this be used with a standard drill or impact driver? Yes. It uses a 1/4 inch hex drive and includes a hex driver for installation.
- Is this for exterior use? Simpson states the mechanically galvanized Class 55 coating is approved for interior and many exterior applications, including use with certain preservative-treated woods.
- How many screws are in this package? This SD9112MB package contains 3000 screws.
Reviews
There are no reviews yet.