Hidden Deck Fasteners for Composite Deck Boards - 8.5mm / 0.334" Groove Height - Heavy Duty Black Galvanized Steel - Includes Drill Bit and Composite Deck Screws to Attach Deck Clips
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Availability:
In Stock.
Arrives
Friday, Nov 28
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Material Type: Galvanized Steel
Size Name: 0.334"
Features
- THREE SIZES: With groove depths of 6.5mm (0.255"), 8.5mm (0.334"), and 9.5mm (0.374"), Frueh composite deck fasteners fit a variety of composite decking boards. See cross reference grid in images.
- GALVANIZED or STAINLESS STEEL - NOT PLASTIC: Made from high-quality black-coated galvanized or stainless steel, these hidden deck fasteners for composite decking are built to last and will not crack or break during installation.
- NARROW GAP: The 3-4mm (3/16" - 1/4") board gap creates a seamless look and feel for your deck. Use in tandem with Frueh deck board spacers to give your composite deck an extra professional look.
- EASY INSTALLATION: Each package includes 50x hidden deck clips, 50x stainless steel screws (3.9x20 mm, T15), and 1x drill bit for hassle-free installation of your composite deck boards.
- MADE IN GERMANY: These heavy duty composite decking fasteners are made in Germany with US-based customer service. We are quick to respond and answer any questions you may have.
Size: 0.334"
Color: Black
Material: Galvanized Steel
Brand: Früh Building Systems
Item dimensions L x W x H: 1.85 x 1.46 x 0.39 inches
Fastener Type: Square
Head Style: Flat
Finish Type: Black
Shape: Square
Item Diameter: 0.33 Inches
Thread Size: 3.9-20
Number of Pieces: 50
Compatible groove diameter: 0.33 Inches
Manufacturer: Frueh Building Systems
Part Number: 6WPC
Item Weight: 1.75 pounds
Item model number: 6WPC
Finish: Black
Cutting Diameter: 0.33 Inches
Included Components: Drill Bits
Batteries Included?: No
Batteries Required?: No
Date First Available: February 28, 2023
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Nov 28
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Material Type: Stainless Steel
Size Name: 0.255"
I’ve been building for 16 years and recently decided to tackle my own deck project at home. After a lot of research, I chose these hidden deck fasteners because they’re metal—far superior to the standard plastic ones that often crack or degrade over time. I started decking this weekend, and I couldn’t be more impressed. These fasteners are a breeze to install, and the quality is evident as soon as you handle them. They’re sturdy, well-designed, and make the process smooth and efficient. If you’re looking for durability and ease of use, these are worth every penny!
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Reviewed in the United States on December 1, 2024 by Jon Jon
Material Type: Galvanized Steel
Size Name: 0.374"
Why did you pick this product vs others?: worked as i wanted to get the gap smaller for the trex decking boards. had to get new screws however since the screws supplied are so short.
Reviewed in the United States on June 21, 2025 by Andrew M.
Material Type: Galvanized Steel
Size Name: 0.374"
We were debating on redoing a wood deck to composite for a non profit. Cost was a factor and was holding us up on doing the project. We were happy to find these clips here as they cut our cost nearly in half from in-store prices. I used these with TimberTech grooved boards and they fit correctly and can get tight against the groove. It takes more than one person to do a great job holding the board tight while securing the next row of fasteners. So I would definitely recommend also buying the spacers they sell. Which are pretty cheap for a pack of 20. Agree with others that one per joist is definitely a requirement unless you have incredibly level joists. Otherwise due to the flex in composite decking you will hear it slap the joist while walking on the place you didn't put a fastener.
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Reviewed in the United States on February 29, 2024 by Jared Jared
Material Type: Galvanized Steel
Size Name: 0.255"
Will not buy again
Reviewed in the United States on June 9, 2025 by New user
Material Type: Galvanized Steel
Size Name: 0.374"
I needed to put hidden fasteners between a channeled and rounded deck board, where the usual "c" fastener wouldn't work, as I needed to install the board and then secure the fastener. I was able to install these and hammer down the single bracket on the unused side so I could put the rounded edge board on top of it.
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Reviewed in the United States on December 16, 2024 by Matt
Material Type: Galvanized Steel
Size Name: 0.255"
I spent hours researching and ordering like ten different hidden fasteners, because I didn't like the Trex hidden fastener, the gap was too large between the planks (3/16" to 1/4"). So I tried out all the ones I bought and this Fruh one is hands down the best, sturdy, solid construction, easy to install, and the gap is half the size, about 1/8" (between 3-4mm) which looks so much nicer on my deck. No worries of kids fingers getting stuck or high heels tripping because of the gap. Water can still go down easily and the deck can breathe so mold won't grow (if there is no gap, then that could happen). I saved you a lot of time, trust me, if you are looking for a smaller gap than Trex, you found your fastener. Remember to choose the taller one for Trex, 8.5mm high fits the grooved edge perfectly.
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Reviewed in the United States on August 11, 2023 by funNtheSun
Material Type: Galvanized Steel
Size Name: 0.334"
Great product. I wasn't sure how well the included bit would work, but it had a nice tight fit with the screw and didn't slip out when I was screwing in the fasteners. These hidden fasteners have a firm hold and don't leave much of a gap between the boards, which is fantastic.
Reviewed in the United States on January 24, 2024 by Austin White
Material Type: Galvanized Steel
Size Name: 0.374"
Like the clips but screws are too short and you don't get enough so have to go buy screws from hardware store. Also you can't get them in bulk quantity which makes them very expensive. If I did not start with them I would have gone with a different brand that provides quantity, longer screws and more screws.
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Reviewed in the United States on February 9, 2025 by Missy