The Simpson EB-TY EB332W Premium Hidden Deck Fastener Kit with 2-1/4 in. Type 316 Stainless-Steel Screws by Simpson Strong-Tie is a complete concealed deck-fastening solution engineered for 3/4 in. wood deck boards with moisture content greater than air dry (approx. 19%), making it well suited for fresh-cut hardwoods and moisture-rich lumber commonly used in deck and boardwalk construction. A stainless-steel reinforcing plate integrated into each polypropylene biscuit adds stiffness to hold boards firmly in place while still allowing natural seasonal expansion and contraction - so your deck stays tight and true through changing weather without buckling or gapping. Every component needed for a professional hidden-fastener installation is included in a single kit, from predrill guides and drill bits to Ipe wood plugs for clean first and last board finishes.

Key Features

• Patented EB-GUIDE predrill guide provides precise fastener angle alignment - ensures every biscuit is installed at a consistent angle, eliminating guesswork and delivering a uniform, professional result across the entire deck surface.
• Stainless-steel reinforced biscuit with increased pullover resistance - the integrated reinforcing plate keeps boards locked down under load, reducing the risk of boards lifting or shifting over time.
• Underside keel for consistent fastener positioning - registers each biscuit in the same location relative to the board edge every time, so board spacing stays even from start to finish.
• Radius sides and chamfered edges on each biscuit - allow the fastener to seat quickly and accurately between boards, speeding up installation and reducing the need for adjustments.
• Type 316 stainless-steel trim-head 6-lobe screws with black-painted heads - offer superior corrosion resistance for outdoor exposure while blending visually with the EB-TY biscuit for a fully concealed finish.
• Kit includes EB-GUIDE predrilling tools, 1/8 in. quick-release impact-ready drill bits, T-15 6-lobe driver bits, and Ipe wood plugs - every accessory required for first-board-to-last-board installation arrives in one package, eliminating separate sourcing of hardware or tooling.
• 3/32 in. board spacing requirement maintained by the biscuit design - provides the correct gap for drainage and airflow between deck boards without relying on manual spacers or measuring.

Why This Product

• Truly hidden fastening with no surface hardware visible - because the biscuits and screws are seated between and beneath boards, the finished deck surface shows only clean wood grain, making this system the right choice for homeowners and contractors who want a high-end, fastener-free appearance.
• Redesigned for greater strength without sacrificing flexibility - the stainless-steel reinforcing plate added in Simpson Strong-Tie's updated biscuit design means boards are held more securely than earlier hidden-fastener systems while still accommodating wood movement, reducing the risk of warping, cupping, or loosening boards over seasons.
• A complete system built around installation accuracy - the inclusion of the patented EB-GUIDE, a dedicated impact-ready drill bit, and a 6-lobe driver bit means the fastening angle, screw drive, and board spacing are all controlled by purpose-built tools rather than improvised methods, resulting in fewer installation errors and a cleaner finished deck.
• Type 316 stainless-steel hardware suited for demanding outdoor environments - unlike standard stainless or coated fasteners, Type 316 alloy provides a higher level of corrosion resistance, making this kit a practical choice for decks, docks, and boardwalks exposed to persistent moisture, rain, and humidity.

Specifications

• MPN: EB332WD316R275
• Biscuit Model No.: EB332W
• Brand: Simpson Strong-Tie
• Material: Polypropylene
• Installs With: Type 316 stainless-steel screw, included
• Screw Size: #7 x 2-1/4 in.
• Decking Thickness: 3/4 in.
• Board Spacing Requirement: 3/32 in.
• Quantity: 275
• Country of Origin: United States

Approved Applications

• Decks - Deck Boards Wood

What's Included

• (275) EB-TY Premium biscuits
• (300) Type 316 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 screws are included with this kit, and why does it matter?

This kit includes Type 316 stainless-steel trim-head, 6-lobe screws with black-painted heads. Type 316 stainless steel offers superior corrosion resistance, making it well suited for outdoor deck applications exposed to moisture, sun, and rain. The black-painted heads blend in with the EB-TY biscuit for a concealed, finished appearance.

What is the EB-GUIDE predrilling tool and why is it important?

The EB-GUIDE is a patented predrill guide included in this kit that provides precise fastener angle alignment for consistent biscuit installations. Using the EB-GUIDE ensures every fastener is driven at the correct angle, resulting in uniform spacing, proper board positioning, and a professional-quality finished deck.

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

The EB-TY EB332W Premium Hidden Deck Fastener System is designed for use with 3/4-in. or greater wood decking with a moisture content greater than air dry, which is approximately 19%. A board spacing requirement of 3/32 in. should be maintained during installation to allow for seasonal movement.

How does the stainless-steel reinforcing plate improve performance?

Simpson Strong-Tie redesigned the EB-TY biscuit by integrating a Type 300 series stainless-steel reinforcing plate directly into the biscuit body. This plate adds stiffness to hold boards in place securely while still maintaining the flexibility needed to accommodate natural seasonal wood expansion and contraction, providing increased pullover resistance over the previous design.