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Internet # 204837519

Model # 96015

Store SKU # 1000037095

5/16 in. x 6 in. RSS Star Drive Washer Head Alternative Lag Screw

  • Easy to install lag screw alternative
  • Integrated washer head allows for maximum clamping force
  • For interior / exterior use
  • View More Details
0 in stock
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Product Details

About This Product

The GRK Fasteners RSS screw is made from Climatek 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
  • Made of extremely high quality carbon steel that provides high tensile torque and shear strength
  • Self-tapping - no pre-drilling required
  • Installs with a standard drill
  • W-cut thread design
  • Climate corrosion resistant coating
  • Built-in washer
  • Sharp zip-tip point bites instantly into material for ease of starting with minimal force and reduce splitting
  • CEE thread design reduces friction and makes driving easier
  • Short rounded head provides low profile finish with no sharp edges
  • Excellent lag screw alternative
  • Return Policy

Product Information

Internet # 204837519

Model # 96015

Store SKU # 1000037095



Screw Length

6 in


5/16 in

Thread Pitch (mm)

3.5 mm

Threads Per Inch (TPI)



Color Family


Drive Style


Fastener Color


Fastener Material

Carbon Steel

Fastener Plating

Electro Galvanized Zinc

Fastener Type

Structural Screws


ACQ Rated, Self Tapping



Head Style

Low Profile Head


Driver Bit


Exterior, Interior

Materials Fastened

Wood to Wood

Measurement System


Package Quantity


Product Weight (lb.)

.056 lb



Thread Style

W-Cut Thread

Warranty / Certifications

Manufacturer Warranty


Questions & Answers

Q:what size torx bit do you use for 3/8 x 12"
by|May 14, 2024
1 Answer
Answer This Question

A:  Hi, Phil. The 3/8 series require a T-40 bit. These bits will be included with Pro Packs and Bulk Boxes.

by|May 21, 2024
    Q:Would these screws hold up to a saltwater environment? I would use them to attach the back to a bench on a dock in Florida.
    by|Apr 29, 2024
    1 Answer
    Answer This Question

    A:  Hello, Thank you for reaching out. Unfortunately, for an application near salt water you will need to use a stainless-steel fastener and the RSS does not come in that variety. If you have any questions, feel free to reach us on our hotline. The number is 800-222-6990. Have a great day!

    by|May 2, 2024
      Q:Would these be recommended for a small tree fort/house. For the foundation.
      by|Feb 21, 2024
      1 Answer
      Answer This Question

      A:  Hi Richard, our GRK RSS screws are structurally rated for any structural build or framing applications. However, we do recommend you give us a call or email so we can recommend the best sizes for your build at: 800-222-6990 or tech@paslode.com.

      by|Feb 28, 2024
        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
        2 Answers
        Answer This Question

        A:  Realistically it needs pilot hole. None of my battery drills or impact drivers could drive these through that much wood - the motors were burning hot and giving up.

        by|Mar 16, 2024

          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 25

            Customer Reviews

            4.9 out of 5

            • 4.9 out of 225 reviews
            • 93% recommend this product
            Filter by:
            Showing 1-10 of 225 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.
            • 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.
            • Verified Purchase
            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.
              • 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
              • Verified Purchase
              • Recommended
              So much better then a lag bolt. With the torx head this goes in very easy with a cordless screw d...
              So much better then a lag bolt. With the torx head this goes in very easy with a cordless screw driver. We use this in place of the old style bolt head lag bolt. You can't go wrong with this screw and brand.
              • Pro
              • Recommended
              Easy to use, exactly what I needed.
              • Verified Purchase
              I just needed two of these. They are very well made and did the job ?
              • Verified Purchase
              An employee help me find exactly what I needed. They worked well for my project.
              • Verified Purchase
              • Verified Purchase
              • Verified Purchase
              Showing 1-10 of 225 reviews