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Internet # 203525067

Model # 112225

Store SKU # 518167

5/16 in. x 4 in. Star Drive Round Head Rugged Structural Wood Screw (45-Piece per-Pack)

Includes 45 units (55¢ /unit)
$24.97
  • Easy to install lag screw alternative
  • Integrated washer head allows for maximum clamping force
  • For interior / exterior use
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Product Details

GRK's RSS screw is made out of Climate coated and hardened steel. Its sharp threads and point bite instantly into material (including hardwood), reducing the splitting effect caused by smaller shanks. Its washer type head has no sharp edges like conventional lag screws and the added shoulder underneath the washer has the ability to center the RSS screw in predrilled hardware.
  • Ideal for ledger boards and more
  • Self-tapping
  • May be used as a lag screw alternative
  • W-cut thread design
  • Washer heads for flush installation
  • Return Policy
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Specifications

Dimensions

Screw Length4 inSize5/16 in
Thread Pitch (mm)3.5 mmThreads Per Inch (TPI)7.2

Details

Drive StyleTorxFastener ColorBrass
Fastener MaterialCarbon SteelFastener PlatingZinc
Fastener TypeLag ScrewsFeaturesACQ Rated, Self Tapping
Head StyleRound HeadIncludedDriver Bit
Interior/ExteriorExterior, InteriorMaterials FastenedWood to Wood
Measurement StandardSAEPackage Quantity45
Product Weight (lb.).043 lbReturnable90-Day
Thread StyleW-Cut

Warranty / Certifications

Manufacturer WarrantyNo
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Questions & Answers

70Questions
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Q:Why are they 3 1/8 inches instead of 3 inches? What is the point of the extra 1/8 inch?
by|Oct 23, 2023
1 Answer
Answer This Question

A:  They are designed to be a code-approved replacement for 16D sinker nails. That's the length needed to meet strength requirements.

by|Nov 14, 2023
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    Q:I have a modular, interlocking, 6 thick styrofoam roof panel clad in sheet aluminum. I want to add a typical roof gutter system but I am unsure of what fastener will hold in the styrofoam, will yours? Paul
    by|Oct 14, 2023
    1 Answer
    Answer This Question

    A:  Hi, I'm Andrew from GRK. We do not recommend the use of the GRK RSS to be used while penetrating aluminum sheet metal in an exterior application.

    by|Nov 13, 2023
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      Q:Can these be used to drill into Trex deck boards? Looking to anchor a gazebo on trex deck boards.
      by|Jul 24, 2023
      1 Answer
      Answer This Question

      A:  Hi I'm Andrew from GRK. We recommend contacting a local, licensed engineer to determine the appropriate product for your specified application.

      by|Jul 24, 2023
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        Q:Can you *really* drive this 3/8-wide lag screw through ten inches of wood without pre-drilling? Specifically, railroad ties.
        by|Jul 17, 2023
        1 Answer
        Answer This Question

        A:  Hi, I'm Andrew from GRK. The 3/8" x 10" RSS fastener is capable of performing this task. If there are structural considerations in your particular application, we recommend contacting a local, licensed engineer to evaluate the appropriate fasteners.

        by|Oct 6, 2023
          1 found this answer helpful
          Showing 1-4 of 70
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          Customer Reviews

          4.9 out of 5
          (775)
          • 4.9
            out of 775 reviews
          • 96% recommend this product
          Filter by:
          Showing 1-10 of 775 reviews
          Used to use to anchor a floating ceiling medallion to the ceiling. They are “self tapping” so no pilot hole is needed once you mark your studs. Quality fastener for heavy duty needs.
          by
          • Verified Purchase
          Holy cow these babies know how to screw into the...
          Holy cow these babies know how to screw into the 4x4‘s we used to build the hen house base. Self tapping and snugged it together perfectly. The t30 bit didn’t slip at all. Superior product to keep it together.
          by
          • Verified Purchase
          Easy and super strong
          Worked great for holding together a 4x4 pressure treated frame
          by
          • Verified Purchase
          • Recommended
          Do not use on exterior projects or PT wood
          Completely corrodes into rust in a year. I built several projects with GRK and all screws are failing some are so bad the head breaks off. I am going to remove all of them and replace with stainless. Horrible product and waste of time and money.
          by
            15 found this review helpful
            STRONG
            I used two to mount a BMW wheel on the wall of my garage. I pobably only needed one as i coud do chin ups on it! I tried to remove the coating with a wire wheel to get it silver but had to use a sanding wheel. Looks like it would hold up to the elements outside.
            by
              • Recommended
              1 found this review helpful
              I used these fasteners to hold 4' x 8' sheets of 1/4" peg-board to the wall with nylon spacers be...
              I used these fasteners to hold 4' x 8' sheets of 1/4" peg-board to the wall with nylon spacers behind. Now there are shovels, rakes, pitch-forks and the like hanging on the peg-board. These fasteners might be above and beyond, but I do not have to worry about the things coming off the wall.
              by
              • DIY
              • Verified Purchase
              • Recommended
              1 found this review helpful
              Worked as designed. Used them to attach a mailbox to the post
              Worked as designed. Used them to attach a mailbox to the post
              by
              • Verified Purchase
              • Recommended
              Recommend by my building inspector and it has saved me money and time. Impact driver drills it in...
              Recommend by my building inspector and it has saved me money and time. Impact driver drills it in in as little as 10 seconds.
              by
              • Verified Purchase
              • Recommended
              Used for a lofted bed assembly and worked great. Easy to use and hold well.
              Used for a lofted bed assembly and worked great. Easy to use and hold well.
              by
              • Verified Purchase
              • Recommended
              2 found this review helpful
              I just had a new pole barn built, and the builders used these screws. It took a bit to find them...
              I just had a new pole barn built, and the builders used these screws. It took a bit to find them, because they are not well advertised, but my wife found them at Home Depot. These screws are awesome. I had some customization on the new barn, so I bought two boxes of these, then 4 more for the farm. I liked the design and performance so well, I bought some #10's for smaller work. These screws drive easy and hold. If you wanted even better hold, get longer screws, but the ones I bought worked great through 2 inch wood. All in all, I can see me switching to these screws over lots of other kinds Phillips head screws.
              by
              • Verified Purchase
              • Recommended
              1 found this review helpful
              Showing 1-10 of 775 reviews