Simpson 175-EB TT 316-TT Hidden Deck Fastener for TimberTech Decking by Simpson is a polypropylene biscuit fastener system engineered to create a completely clean, fastener-free deck surface when used with TimberTech decking. The EB-TY fits into a slot cut into the edge of each deck board using a standard biscuit joiner, securing boards from the side so no fastener heads are visible from above - delivering a professional, seamless finish that also simplifies future deck resurfacing.

Key Features

• Easy to install since all fastening is done from the top side
• Affords easier deck resurfacing since nail heads are eliminated from the deck surface
• Formed from long-lasting polypropylene to last the life of the deck
• Stainless-steel #7 trim-head screws included (black head, 6-lobe T-15 drive)
• Each EB-TY package includes enough EB-TY fasteners and screws to install 100 square feet of decking
• Quantity: 175

Specifications

• Model No.: 175-EB TT
• Biscuit Model No.: 316-TT
• Material: Polypropylene
• Color: Black
• Decking Thickness: 3/4" to 1 1/2"
• Board Spacing: 3/16"
• Packaging Type: Bucket
• Packaging Qty.: 175
• Country of Origin: United States

Approved Applications

• Decks - Deck Boards Wood (TimberTech decking)

What's Included

• EB-TY fasteners
• 316SS #7 trim head screws
• (1) T15 Driver Bit
• (10) #10 x 2-3/4" DCU 305SS fasteners for securing starter board
• (1) T20 Driver Bit

Frequently Asked Questions

How does the EB-TY hidden deck fastener work?

The EB-TY is a polypropylene biscuit fastener that fits into a slot cut into the edge of each deck board using a standard biscuit joiner. Once inserted, a screw is driven through the biscuit and into the joist from the top side, keeping the deck surface completely free of visible fastener heads. Each successive board is nested against the installed EB-TY, automatically ensuring consistent spacing and uniform height.

How much decking can one package of the 175-EB TT cover?

Each EB-TY package includes enough EB-TY fasteners and screws to install 100 square feet of decking. This bucket contains a quantity of 175 fasteners.

What board spacing does the 175-EB TT provide?

The 175-EB TT automatically creates a consistent 3/16" gap between deck boards. Because each board nests directly against the installed EB-TY fastener, uniform spacing is achieved without the need for manual measuring or spacer tools.

What type of screws are included with the 175-EB TT?

The package includes 316 stainless steel #7 trim head screws with a black head and a 6-lobe T-15 drive, along with a T15 driver bit. Also included are (10) #10 x 2-3/4" DCU 305SS fasteners for securing the starter board and a T20 driver bit.