Simpson #8 x 3 in. Collated Trim-Head Screw Type-17 Point Quik Guard Coat #2 Sq Drive 1000-Pk DTHQ3S from Simpson is a collated trim-head decking screw built for fast, clean installation on exterior wood, PVC, and composite deck surfaces, as well as fencing applications. Designed for use with the Simpson Strong-Tie Quik Drive PRO300SG2 auto-feed screwdriving system, these coarse-thread fasteners combine a low-profile trim head with Quik Guard coating to deliver a finished, professional result that holds up in exterior and certain preservative-treated wood environments.

Key Features

• Trim head with nibs for easy countersinking - the low-profile head sits flush with the surface for a clean, finished appearance on decking and fencing projects
• Curved collation - engineered for compatibility with the Quik Drive auto-feed screwdriving system, enabling faster, more consistent installation compared to hand-driving individual fasteners
• Coarse threads with Type-17 point - coarse threads grip wood firmly for strong holding power, while the Type-17 point helps reduce splitting as the screw drives in
• #2 undersized square drive - the undersized square drive geometry reduces cam-out during installation, helping maintain control and protect the screw head finish
• Quik Guard coating - provides corrosion resistance suited for exterior and certain preservative-treated wood applications, keeping fasteners performing reliably in outdoor conditions
• Driver bit included in every box - a #2 undersized square-drive bit is included so you can get started immediately, with replacement bit model BIT2SU available if a spare is ever needed

Why This Product

• Auto-feed compatibility speeds up large projects - curved collation lets these screws load directly into the Simpson Strong-Tie Quik Drive PRO300SG2 system, dramatically reducing installation time on decks and fencing runs where hundreds of fasteners are needed
• A trim head that disappears into the surface - the nibs on the trim head allow for easy countersinking without pre-drilling a separate recess, leaving a neat, low-profile result that suits the finished look of composite and PVC decking
• Built for outdoor exposure - Quik Guard coating is formulated for corrosion resistance in exterior settings and certain preservative-treated wood applications, making these screws a dependable fastener choice where weather and chemical exposure are a concern
• Everything you need, ready to install - the included #2 undersized square-drive bit means no extra trip for tooling before a job starts, and the 1,000-count packaging keeps high-volume exterior framing, deck board, and fencing work moving without frequent restocking

Specifications

• Model Number (MPN): DTHQ3S
• Screw Size: #8
• Length: 3 in.
• Head Type: Trim Head
• Head Diameter: 0.246 in.
• Drive Type: #2 Square, Undersized
• Thread Type: Coarse Threads
• Thread Length: 2.157 in.
• Point Type: Type-17 Point
• Collation Type: Curved
• Coating/Finish: Quik Guard Coating
• Packaging Quantity: 1,000
• Compatible Tool: Simpson Strong-Tie Quik Drive PRO300SG2 auto-feed screw driving system or attachment

Approved Applications

• Fencing
• Exterior decking (PVC and composite deck installations)
• Certain preservative-treated wood applications

What's Included

• #2 undersized square-drive bit (replacement bit model BIT2SU)
• 1,000 collated trim-head screws

Frequently Asked Questions

What auto-feed system is this screw designed to work with?

These collated trim-head screws are designed to install with the Simpson Strong-Tie Quik Drive PRO300SG2 auto-feed screw driving system or compatible attachment.

What does the Quik Guard coating protect against?

The Quik Guard coating provides corrosion resistance for exterior and certain preservative-treated wood applications, making these screws suitable for outdoor use including decking and fencing projects.

Is a driver bit included with this product?

Yes, each box includes a #2 undersized square-drive bit. If a replacement is ever needed, the replacement bit model is BIT2SU.

Why is the head design on these screws beneficial for decking?

The trim head features nibs that allow for easy countersinking, resulting in a clean, low-profile finish that is especially desirable on PVC or composite deck surfaces where appearance matters.

Note: Product dimensions and/or thread length may differ from picture. Please refer to the specifications listed above for exact measurements.