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Früh Building Systems

Hidden Deck Fasteners for Composite Deck Boards - 8.5mm / 0.334" Groove Height - Heavy Duty Black Stainless Steel - Includes Drill Bit and Composite Deck Screws to Attach Deck Clips

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Availability: In Stock.
Fulfilled by Amazon
Arrives Friday, Nov 28
Order within 8 hours and 35 minutes
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Material Type: Stainless 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 about our deck clips.

Features

  • Durable and Weather-Resistant: Made from high-quality black-coated galvanized or stainless steel, these clips are built to last and withstand the elements.
  • Variety of Sizes: With groove depths of 6.5mm (0.255"), 8.5mm (0.334"), or 9.5mm (0.374") our clips fit just about any deck board.
  • Seamless Look: Our 3-4mm (3/16" - 1/4") board gap creates a seamless look and feel for your deck.
  • Easy Installation: Each package includes 50x hidden fasteners, 50x stainless steel screws (3.9x20 mm, T15), and 1x drill bit for hassle-free installation.
  • Coverage: Calculating the number of clips required for your deck is simple - use 10 clips per square meter or 1 clip per square foot.

Description

Choose your materialIntroducing our high-quality Hidden Deck Fasteners, designed to make the installation of your deck boards quick and easy. Available in two materials, black-coated galvanized steel or black-coated stainless steel, these clips are built to withstand the elements and provide lasting durability.Suitable for a variety of composite deck boardsBased the manufacturer and model of your deck boards, choose between three different groove heights: 6.5mm (0.255"), 8.5mm (0.334"), and 9.5mm (0.374"). The 3-4mm (0.118 - 0.157") board gap provides a near seamless look while providing ample space for your deck boards to expand and contract with changes in temperature and humidity.What to expectEach package contains 50 clips, 50 stainless steel screws (3.9x20 mm, T15), and a drill bit to ensure hassle-free installation. With a coverage ratio of 10 clips per square meter (1 clip per square foot), you can easily calculate the number of clips you need for your deck project.Build easyUpgrade your deck with our hidden fasteners today and enjoy a long-lasting, hassle-free outdoor space from Frueh Building Systems.


Manufacturer: ‎Frueh Building Systems


Part Number: ‎4250-03-2


Item Weight: ‎1.75 pounds


Product Dimensions: ‎1.85 x 1.46 x 0.39 inches


Country of Origin: ‎Germany


Item model number: ‎4250-03-2


Size: ‎0.334"


Color: ‎Black


Material: ‎Stainless Steel


Shape: ‎Square


Number Of Pieces: ‎50


Included Components: ‎Drill Bits


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: September 7, 2023


Manufacturer: ‎Frueh Building Systems


Part Number: ‎4250-03-2


Item Weight: ‎1.98 pounds


Product Dimensions: ‎1.85 x 1.46 x 0.39 inches


Item model number: ‎4250-03-2


Size: ‎0.334"


Color: ‎Black


Material: ‎Stainless Steel


Shape: ‎Square


Number Of Pieces: ‎50


Mounting Type: ‎Wall Mount


Included Components: ‎Drill Bits


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: September 7, 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.

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Similar Products

Top Amazon Reviews

    • Best tight gap clips for composite deck boards
Material Type: Stainless Steel Size Name: 0.374"
I have spent hours and hours researching deck spacing clips trying to find something in the 1/8 inch spacing instead of the 1/4 inch spacing for Deckorator composite decking boards. The vast majority of the clips are 1/4 inch with screws that show between the boards. I tried one brand that advertised a 3/32 inch space, but the clips were too wide when fitting into the grooves of the boards and did not allow the proper gapping. So I tried this FRUH German design and it worked perfectly. The 1/8 inch gapping is a much nicer look and the screws do not show between the boards. Plus, the stainless steel will out live the plastic competitors by many years. ... show more
Reviewed in the United States on July 24, 2025 by Masked Crusader
    • Superior quality and simple to install
Material Type: Stainless Steel Size Name: 0.255"
Review Image by Jon Jon
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! ... show more
Reviewed in the United States on December 1, 2024 by Jon Jon
    • great for trex boards
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.
    • Happy with Cost and Quality
Material Type: Galvanized Steel Size Name: 0.374"
Review Image by Jared Jared
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. ... show more
Reviewed in the United States on February 29, 2024 by Jared Jared
    • Useless product. Not really needed
Material Type: Galvanized Steel Size Name: 0.255"
Will not buy again
Reviewed in the United States on June 9, 2025 by New user
    • Absolute best hidden fasteners for Trex deck!
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. ... show more
Reviewed in the United States on August 11, 2023 by funNtheSun
    • Adaptable.
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. ... show more
Reviewed in the United States on December 16, 2024 by Matt
    • The Trex size
Material Type: Stainless Steel Size Name: 0.374"
The Trex size worked well. They space just short of 3/16 inch. Screws are short but there is no need for longer.
Reviewed in the United States on August 17, 2025 by da Yooper

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