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3/16 in. 6 in. TimberLok Coarse Steel External Hex Drive, Hex Head Heavy-Duty Wood Screws (50-Pack)

$4347
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  • Penetrates dense lumber with no pre-drilling needed
  • Great for deck framing, fencing, landscape walls and more
  • Faster, easier and stronger than 3/8 in. lag screws
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Product Details

TimberLOK is a heavy-duty wood screw available in a variety of lengths and packaging sizes. Lengths such as for attaching rafter or trusses to top plate, landscape timbers, fences, decks, headers, stair stringers, and more. A free bit is included in every package.
  • No predrilling
  • Faster and easier than 3/8" lag screw
  • Countersinking head style
  • Guaranteed corrosion resistance - ACQ approved
  • IBC/IRC code compliant - ICC-ES ESR-1078
  • Common project applications: remodeling, fencing, storage, cabinets, framing
  • Return Policy

Additional Resources

From the Manufacturer

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Specifications

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Questions & Answers

20Questions
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Q:How much weight can this screw hold?
by|Dec 21, 2022
2 Answers
Answer This Question

A:  I am not exactly sure, but these are very high quality. I have been using them for a little over two years after I learned of them.

by|Dec 22, 2022

    A:  Thank you for your question. The answer depends on wood species, wet or dry, wood thickness, the direction of load, etc. Please see the link below which will provide values based on the answers to those questions. ESR-1078: https://d3g5z6m6vcoqo2.cloudfront.net/resources/ESR-1078-Revised-0922.pdf

    by|Dec 30, 2022
      1 found this answer helpful
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      Q:Can these be used to attach a surface mount deck railing (where it specifies to use 3/8" lag screws)?
      by|Jan 13, 2022
      4 Answers
      Answer This Question

      A:  Yes, they’re very sturdy , just need a smaller pilot hole.  (If you’re attaching to something like a 2x8, you might rather drill the hole through and use a bolt, nut and flat washers)

      by|Jan 19, 2022

        A:  I'm pretty sure this would be acceptable, to be sure you can reference DCA-6, which is the Designed for Code Acceptance standard on deck building. These Timber-Loks have similar strength to lag screws and don't need pre-drilling for pilot holes

        by|Jan 18, 2022

          A:  The TimberLOK is equal in shear strength to the 3/8 lag screw however it is weaker in tension (less thread and 20% lower tension per inch of thread). The post base mount for railings are designed to resist tension loads. For this reason, we would not recommend that these be swapped for lag screws in this application.

          by|Jan 13, 2022

            A:  sure but remember they have a shaft and not totally threaded

            by|Jan 21, 2022
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              Q:What is the diameter of the washer portion of the fastener head?
              by|Dec 8, 2021
              1 Answer
              Answer This Question

              A:  Thank you for your question. The diameter of the washer portion of the TimberLOK screw is 15/32". This information and more specs on Fasten Master screws is available in the technical section of our website. Please feel free to contact Fasten Master at 800.518-3569 or techsupport@fastenmaster.com if you need further assistance.

              by|Dec 8, 2021
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                Q:Can I countersink these into my ledger so I can attach another board flush to this?
                by|Aug 4, 2021
                1 Answer
                Answer This Question

                A:  The TimberLOK can be countersunk. However, the outermost board being attached next should be fastened using 5" LedgerLOKs to make sure that the loads are passed all the way from the outermost ledger to the rim inside the house.

                by|May 14, 2022
                  1 found this answer helpful
                  Showing 1-4 of 20
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                  Customer Reviews

                  4.9 out of 5
                  (389)
                  • 4.9
                    out of 389 reviews
                  • 98%recommend this product
                  Filter by:
                  Showing 1-10 of 389 reviews
                  Perfect for my need. Exceeded expectations.
                  Perfect for my need. Exceeded expectations.
                  by
                  • Verified Purchase
                  • Recommended
                  spot on
                  Best screws for landscaping timbers! Pulls the together nicely and the hex heads make easy work of the job
                  by
                    • Recommended
                    Great stuff! Fast & Easy Timesaver!
                    I bought a box of 6-inch and a box of 8-inch screws to build some heavy-duty benches for the fire pit area I'm constructing--using 6" x 6" and 4" x 6" pressure-treated lumber. Using the Timberlok screws saved me A LOT of time and energy over my initial plan to use lag screws to attach the pieces together. Using lag screws, I'd have to pre-drill all the holes to depth and then ratchet them in. With the Timberlok screws, I just had to use the bit included with each box to screw them in (after countersinking for the screw heads). Despite the thickness and density of the pressure-treated wood, the Timberlok screws went in pretty easily. I used the 8-inch screws to attach the 4" x 6"s to the 6" x 6"s (a triangle of three at each end) and the 6-inch screws to attach the 4" x 6"s to each other (two at each end and two in the middle). Then I capped the tops of the benches with deck boards. I attached each of the 6" x 6" bases together with Heavy Duty Liquid Nail and two 10" galvanized spikes--although I could've easily used 8-inch Timberlok screws to make the connections. (I didn't happen on the Timberlok screws until the bases were already done.) I was able to assemble all four benches on a Sunday afternoon--and they are very solid and sturdy--and seriously heavy. Bench is four-feet wide; seat is one-foot deep and 20-inches high; base is two-feet deep.
                    by
                    • DIY
                    • Recommended
                    5 found this review helpful
                    Excellent Wood Screws & Zip Right In!
                    I bought these to make a 14 Foot 4x4 Pole for a Security Light & an Antenna. I didn't have any 4x4 14 foot options at my Store so I purchased 2 2x4s at 14 foot lengths & screwed them together with these. They hold Tight & made a very sturdy Pole. They zipped right in & did not come through to the other side of board either, All in all both TimberLok & HeadLok screws are OUTSTANDING! Buy without hesitation! BTW: Thompson's Water Seal & Stain In Acorn is Awesome! (To Protect Post)
                    by
                    • DIY
                    • Recommended
                    great for stockade wood fence 4 and 5 inches
                    we use 5 inch for stockade fence. GREAT come with own drill adpter easy to back out don`t strip
                    by
                    • Pro
                    • Recommended
                    1 found this review helpful
                    strong
                    Super strong. These help with all load bearing projects when nails just aren’t enough
                    by
                      • Recommended
                      It may be overkill to attach 2x4’s with TimberLOK but...
                      It may be overkill to attach 2x4’s with TimberLOK but that’s what I used them for. I made bases for target stands. They are the best for rugged use.
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                      • Verified Purchase
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                      Showing 1-10 of 389 reviews

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                      Price
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                      $4347
                      /box
                      $5098
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                      $7906
                      Ratings
                      (50)
                      (389)
                      (72)
                      (16)
                      Screw Length10 in6 in 8 in
                      Size1/4 in3/16 in #0
                      Drive StyleExternal HexExternal Hex External Hex
                      Head StyleFlange HexHex Hex
                      Fastener/Connector MaterialSteelSteel Steel
                      Interior/ExteriorExterior,InteriorExterior,Interior Exterior,Interior
                      Package Quantity1250 30
                      FeaturesACQ Rated,Coated,Self Drilling,Self TappingACQ Rated,Coated,Self Drilling,Self Tapping ACQ Rated,Coated,Self Drilling,Self Tapping,Tamper Resistant
                      THD SO SKU336802336802
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