Description

Key Features

Fast Starts

The SawTooth point on this 3-1/2 inch screw helps it bite quickly and drive with less effort, which cuts down on installation time and usually eliminates predrilling in wood-to-wood work.

Secure T40 Drive

The deep T40 6-lobe recess gives the driver bit a solid seat, so the Simpson Strong-Tie Outdoor Accents Structural Wood Screw is easier to control when you are running a lot of fasteners.

Built for Outdoor Use

The black double-barrier coating gives you the finished Outdoor Accents look while adding medium corrosion protection for many exterior applications.

Overview

The Simpson Strong-Tie SDWS22312DBB-R50 Outdoor Accents Structural Wood Screw is a 3-1/2 inch exterior structural wood screw made for wood-to-wood fastening in outdoor builds. This is a structural wood screw designed for fastening wood-to-wood connections in exterior applications. Model Number: SDWS22312DBB-R50. If you want the cleaner look of black decorative hardware but still need a load-rated fastener from a known structural brand, this is the screw that ties that whole system together.

What matters most here is how quickly it installs and how cleanly it finishes. Simpson uses a patented SawTooth point on the 3-1/2 inch version to help the screw start fast, reduce installation torque, and avoid predrilling in most applications. On the job, that means less fighting the screw at startup and less slowdown when you are driving a box of 50 into framing, pergola members, or other exterior wood connections.

The drive interface is a deep T40 6-lobe recess, which is a better setup for structural screws than a shallow recess that cams out under load. You get a more secure bit fit and more control as the head seats. The low-profile head also matters. It keeps the finished connection looking cleaner than a bulky hex head, and under-head nibs help the head seat with better control.

This screw is part of Simpson Strong-Tie’s Outdoor Accents line, so it is not just about holding power. It is also about matching the look of the rest of the hardware. The black double-barrier coating gives it that finished black appearance and provides a medium level of corrosion protection for many outdoor applications. If you are building something visible like a pergola, pavilion, fence detail, or decorative connector assembly, that visual match is a real advantage over mixing in bright zinc or plain structural fasteners.

Dimensionally, this model has a 0.220 inch shank diameter, 0.760 inch head diameter, and 2 inch thread length. Those numbers matter because they tell you this is a true structural screw sized for more serious wood connections, not a light-duty deck screw dressed up in black. It is code listed in IAPMO-UES ER-192, which is the kind of detail pros look for when they need published evaluation backing instead of just a product claim.

It also gives you flexibility in how you use it. You can run the screw by itself as a wood-to-wood fastener, or pair it with Simpson Outdoor Accents decorative hardware and the STN22 hex-head washer when you want the appearance of a bolted connection. That makes it useful for both hidden performance and exposed finish work. The washer is not required for wood-to-wood fastening, but it is part of the system when you are building around the Outdoor Accents look.

Who should buy it? Contractors, deck and pergola builders, remodelers, carpenters, and serious DIYers who care about both structural fastening and finished appearance. If you are building exterior wood projects where the fastener will be seen, this screw makes a lot more sense than using a generic construction screw and hoping it blends in.

Made to Match Outdoor Accents Builds

This screw is built to work inside the Outdoor Accents system, which matters when the connection is visible and the finished look is part of the job.

• Use with Outdoor Accents decorative hardware and the STN22 hex-head washer for a bolt-style appearance
• Black finish visually matches Outdoor Accents connectors and decorative hardware

Drives Clean Without Fighting You

The details on the screw itself are what make installation faster and more controlled when you are driving structural fasteners into framing lumber.

• Patented SawTooth point helps start fast and reduces installation torque
• Deep T40 6-lobe recess provides secure bit engagement
• Low-profile head with under-head nibs helps seat the head with better control

Built for Exposed Exterior Details

On outdoor structures, the fastener finish is part of the final result. This screw is meant for projects where strength and appearance both count.

• Black double-barrier coating offers a premium look with medium corrosion protection for many outdoor applications
• Suitable for exterior wood-to-wood connections and treated lumber applications

What’s in the Box

• (50) Simpson Strong-Tie Outdoor Accents structural wood screws
• (1) T40 drive bit

STN22 hex-head washer is sold separately unless specifically bundled with another model.

Key Specifications

Length	3-1/2 in.
Shank Diameter	0.220 in.
Head Diameter	0.760 in.
Thread Length	2 in.
Drive Type	T40 6-Lobe
Head Type	Low Profile Head
Point Type	SawTooth Point
Material / Finish	Steel with black double-barrier coating
Package Quantity	50
Application	Fastening wood-to-wood

Compatibility

Outdoor Accents Hardware

Designed to coordinate with Simpson Strong-Tie Outdoor Accents decorative hardware for exposed exterior wood connections.

Drive Interface

Uses a T40 6-lobe drive. A T40 bit is included with this multi-count package.

Decorative Washer Option

Can be used with the STN22 Outdoor Accents hex-head washer for a bolt-style finished appearance, or used without the washer for standard wood-to-wood fastening.

Built For

Carpentry Construction General Contracting Remodeling Outdoor Wood Structures Pergolas Decorative Hardware Installs DIY / Hobbyist

Pro Tip

If you want the published Outdoor Accents look, pair this screw with the STN22 washer. If you just need a clean wood-to-wood structural fastener, run it without the washer and save the extra step.

Tool Nut’s Take

Tool Nut’s Take

Simpson Strong-Tie SDWS22312DBB-R50 Outdoor Accents Structural Wood Screw Gets the Job Done Without Looking Like an Afterthought

This is the one to buy when your exterior wood connection needs real structural screw performance and you do not want bright hardware ruining the finished look.

• Who it’s for: Builders, carpenters, deck and pergola crews, and homeowners doing exposed outdoor wood projects with black decorative hardware.
• Why it stands out: The T40 drive, SawTooth point, low-profile head, and Outdoor Accents system compatibility make it faster to install and better looking than generic structural screws.
• Worth knowing: This pack gives you 50 screws and a T40 bit, but the STN22 washer is a separate add-on unless you buy a version that specifically includes it.

Common Questions

• Do I need to predrill with this screw? In most applications, no. The patented SawTooth point is designed for fast starts, lower installation torque, and no predrilling in most wood-to-wood connections.
• Does this screw require the STN22 washer? No. It can be used without the washer as a wood-to-wood fastener, or with the STN22 hex-head washer when you want the Outdoor Accents decorative bolt-style look.
• What driver bit does it use? It uses a T40 6-lobe drive, and a T40 bit is included with this multi-count package.
• Is it suitable for exterior use? Yes. It is intended for exterior wood applications and has a black double-barrier coating that provides a medium level of corrosion protection for many outdoor uses.