The Simpson EB-TY EB332W Premium Hidden Deck Fastener Kit by Simpson is a complete hidden deck-fastening solution engineered to keep wood and composite deck surfaces free of visible screws without sacrificing holding strength. Built around a redesigned polypropylene biscuit reinforced with an integrated Type 300 series stainless-steel plate, this system securely locks boards in place while allowing the natural seasonal movement that wood and composite decking demand. Whether you are building a backyard deck, a dock, or a boardwalk, the included EB-GUIDE predrilling tool and full accessory kit make professional-grade results achievable for installers of all experience levels.

Key Features

• Patented EB-GUIDE predrill guide - provides precise fastener angle alignment for consistent biscuit installations, eliminating guesswork and reducing the risk of misaligned fasteners across every board.
• Stainless-steel reinforced biscuit - adds stiffness and increased pullover resistance so boards stay locked firmly in position even under load or heavy foot traffic.
• Integrated flexibility for seasonal movement - the reinforced biscuit maintains enough give to accommodate natural wood contraction and expansion, reducing the risk of board cupping, buckling, or surface damage over time.
• Underside keel - ensures consistent fastener positioning across every installation, helping deliver uniform board spacing throughout the entire deck surface.
• Radius sides and chamfered edges - allow easier biscuit alignment during installation, speeding up the overall fastening process without compromising accuracy.
• Type 305 stainless-steel trim-head, 6-lobe screws with black-painted heads - blend seamlessly with the EB-TY biscuit color for a concealed finish, while the 6-lobe drive pattern reduces cam outs and driver bit wear.
• Complete kit with dedicated installation tools included - comes with EB-TY Premium biscuits, stainless-steel screws, Ipe wood plugs for first and last board installations, EB-GUIDE predrilling tools, quick-release impact-ready drill bits, and T-15 6-lobe driver bits, so the job starts without a separate tool run.
• Designed for 3/4 in. or greater thickness decking - specified for wood with moisture content greater than air dry (approximately 19%), making it the right choice for freshly milled or green-moisture lumber commonly used on docks and boardwalks.

Why This Product

• A truly complete system, not just a fastener - unlike basic biscuit-only packs, this kit bundles every tool needed for a full installation - predrilling guides, drill bits, driver bits, and Ipe plugs - so there are no missing pieces on the job site.
• Hidden fastening that holds as hard as it hides - the stainless-steel reinforcing plate inside each polypropylene biscuit delivers the pullover resistance of a structural fastener while keeping the deck surface completely free of visible hardware.
• Built for real-world board movement - the biscuit design accounts for the seasonal contraction and expansion inherent in wood decking, protecting the deck surface from the cracking, splitting, and board distortion that rigid fastening systems can cause over time.
• Versatile across multiple outdoor applications - engineered for use on wood and composite deck boards, docks, and boardwalks, giving builders and contractors a single fastening solution they can rely on across a wide range of projects.

Specifications

• MPN: EB332WDR275
• Biscuit Model No.: EB332W
• Brand: Simpson Strong-Tie
• Material: Polypropylene
• Installs With: Type 305 stainless-steel screw, included
• Screw Size: #7 x 2-1/4 in.
• Screw Type: Type 305 stainless-steel trim-head, 6-lobe with black-painted heads
• Decking Thickness: 3/4 in.
• Board Spacing Requirement: 3/32 in.
• Recommended Wood Moisture Content: Greater than air dry (approx. 19%)
• Quantity: 275
• Country of Origin: United States

Approved Applications

• Dock and Boardwalk

What's Included

• (275) EB-TY Premium biscuits
• (300) Type 305 stainless-steel screws
• (20) Ipê wood plugs for first and last board installations
• (2) EB-GUIDE predrilling tools
• (2) 1/8 in. quick-release impact-ready drill bits
• (2) T-15 6-lobe driver bits for reduced cam outs

Frequently Asked Questions

What type of decking boards is the EB332W biscuit compatible with?

The EB-TY EB332W Premium Hidden Deck Fastener is designed for use with 3/4-in. or greater thickness wood decking boards that have a moisture content greater than air dry, which is approximately 19%. It is suitable for applications such as decks, docks, and boardwalks.

How does the stainless-steel reinforcing plate improve performance?

The integrated Type 300 series stainless-steel reinforcing plate adds stiffness to the polypropylene biscuit, which holds boards securely in place and provides increased pullover resistance. At the same time, it maintains enough flexibility to allow for the natural seasonal contraction and expansion of wood decking boards.

What tools are needed to install the EB-TY Premium Hidden Deck Fasteners?

All required installation tools are included in this kit. The EB-GUIDE predrilling tool provides precise fastener angle alignment for consistent biscuit installations. The kit also includes two 1/8 in. quick-release impact-ready drill bits and two T-15 6-lobe driver bits, which help reduce cam-outs during installation. No additional tools beyond a standard drill or impact driver are needed.

What is the required board spacing when using the EB332W fasteners?

A board spacing requirement of 3/32 in. is required when installing decking boards with the EB-TY EB332W Premium Hidden Deck Fastening System. The radius sides and chamfered edges of the biscuit are designed to assist with alignment and help achieve this consistent spacing more easily and efficiently during installation.