The Simpson EB-TY Premium Hidden Deck-Fastening System delivers a clean, screw-free deck surface without sacrificing structural integrity, making it an ideal choice for residential and commercial deck construction, boardwalks, and dock installations. Simpson has redesigned this award-winning hidden fastening system by integrating a Type 300 series stainless-steel reinforcing plate directly into the polypropylene biscuit, adding stiffness to hold boards securely in place while maintaining the flexibility needed to accommodate seasonal expansion and contraction. Paired with the included EB-GUIDE predrilling tool and a full set of installation accessories, this kit gives builders and DIYers everything required for a complete, professional-grade hidden deck fastening installation from start to finish.

Key Features

• Patented EB-GUIDE predrill guide - provides precise fastener angle alignment for consistent biscuit installations, eliminating guesswork and reducing installation errors across every board.
• Stainless-steel reinforced biscuit - adds strength and increased pullover resistance so deck boards stay firmly secured even under heavy load and repeated seasonal movement.
• Underside keel design - provides consistent fastener positioning from board to board, resulting in uniform spacing and a cleaner finished appearance across the entire deck surface.
• Radius sides and chamfered edges - allow easier alignment and faster installation, reducing the time spent fitting each biscuit and keeping the job moving efficiently.
• Type 305 stainless-steel trim-head, 6-lobe screws with black-painted heads - blend in with the EB-TY biscuit for a concealed finish while resisting corrosion in high-moisture environments such as docks and exposed outdoor decks.
• 3/32 in. board spacing requirement built into the system - ensures proper airflow and drainage between deck boards without the need for manual spacers, protecting the wood over time.
• Designed for 3/4 in. or greater wood decking with moisture content greater than air dry (approx. 19%) - makes this system well-suited for green lumber and hardwoods such as Ipe that are installed before reaching equilibrium moisture content.
• Complete installation kit included - EB-TY Premium biscuits, Type 305 stainless-steel screws, Ipe wood plugs for first and last board installations, EB-GUIDE predrilling tool, 1/8 in. quick-release impact-ready drill bit, and a T-15 6-lobe driver bit for reduced cam-outs means no separate tool or hardware purchases are needed to get started.

Why This Product

• A truly complete hidden fastening system in one kit - unlike basic biscuit-only packs, this kit bundles the predrilling guide, impact-ready drill bit, driver bit, Ipe plugs, and screws together, so installers can move from first board to last without hunting down additional components.
• Engineered for strength and seasonal flexibility - the stainless-steel reinforcing plate within each biscuit holds deck boards firmly against movement while still allowing the controlled flex needed as wood expands and contracts, reducing the risk of warping, buckling, or fastener failure over time.
• Suitable for demanding environments - Type 305 stainless-steel screws and a corrosion-resistant polypropylene biscuit body make this system a dependable choice for docks, boardwalks, and any outdoor application where moisture exposure is a consistent concern.
• Faster, more consistent installation through thoughtful design - the patented EB-GUIDE tool, chamfered biscuit edges, and 6-lobe driver bit with reduced cam-out work together to speed up the fastening process and deliver uniform results, even for installers working with this hidden fastening method for the first time.

Specifications

• Model Number (Kit): EB332WDR100
• Biscuit Model Number: EB332W
• Material: Polypropylene
• Screw Size: #7 x 2-1/4 in.
• Screw Type: Type 305 Stainless Steel, Trim-Head, 6-Lobe with Black-Painted Heads
• Installs With: Type 305 stainless-steel screw, included
• Decking Thickness: 3/4 in.
• Board Spacing Requirement: 3/32 in.
• Recommended Wood Moisture Content: Greater than air dry (approx. 19%) for 3/4 in. or greater wood
• Quantity (Biscuits): 100
• Country of Origin: United States

Approved Applications

• Dock and Boardwalk
• Residential and Commercial Deck Construction (3/4 in. or greater wood decking)
• Installations requiring hidden fastening for a clean, screw-free surface appearance
• High-moisture environments where stainless-steel corrosion resistance is required
• First and last board installations (Ipê wood plugs included)

What's Included

Each EB332WDR100 kit contains everything needed for a complete hidden deck fastening installation:

• (100) EB-TY Premium biscuits (Model EB332W)
• (115) Type 305 stainless-steel trim-head, 6-lobe screws with black-painted heads (2-1/4 in.)
• (6) Ipê wood plugs for first and last board installations

Frequently Asked Questions

What is included in this 100-pack kit?

This kit includes 100 EB-TY Premium biscuits, 115 Type 305 stainless-steel screws, 6 Ipê wood plugs for first and last board installations, 1 EB-GUIDE predrilling tool, 1 1/8 in. quick-release impact-ready drill bit, and 1 T-15 6-lobe driver bit.

What decking thickness and wood moisture content is this fastener system designed for?

The EB-TY Premium Hidden Deck-Fastening System is designed for use with decking that is 3/4 in. or greater in thickness, and it is intended for wood with a moisture content greater than air dry - approximately 19% or more.

What board spacing does this system maintain between deck boards?

The EB-TY system is designed to maintain a consistent 3/32 in. spacing between deck boards. The underside keel on the biscuit helps ensure consistent fastener positioning to achieve this uniform gap throughout installation.

Can this fastener system be used for applications beyond residential decks?

Yes. In addition to standard deck installations, the EB-TY Premium Hidden Deck-Fastening System is also suitable for dock and boardwalk applications.