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Model #95400

Store SKU #1005154062

5/16 in. x 3-1/8 in. Star Drive Low Profile Washer Head Structural Wood Screw (100-Pack)

$4598
  • Easy to install lag screw alternative
  • Integrated washer head allows for maximum clamping force
  • For interior / exterior use
  • View More Details
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Price:
$4598

Product Overview

GRK Fasteners' Rugged Structural Screw (RSS) is an easy to install lag alternative. Typical applications include structural decking, general framing, remodeling, structural applications, multi-ply and LVL fastening and ledger board. The W-Cut provides low installation torque which allows for fast driving and ease of install. The Zip-Tip feature allows for no pre-drilling and 1-step installation. The unique thread design draws 2 substrates together while washer head allows zero gap joints. Our Climatek coated screws provide corrosion resistance in pressure treated wood with corrosive ground contact.
  • Easy to install lag alternative
  • 1-step install, no pre-drilling
  • 20% faster drive time
  • Superior clamping force on the first drive

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BrandGRK FastenersGRKGRK FastenersGRK Fasteners
Name5/16 in. x 2-3/4 in. Star Drive Washer Head RSS Structural Screws (100-Pack)5/16 in. x 3-1/8 in. Star Drive Low Profile Washer Head Structural Wood Screw (100-Pack)RSS #10 x 3-1/8 in. Torx Drive Structural Screws (236-Pail)5/16 in. x 4 in. Star Drive Washer Head RSS Structural Screws (100-Pack)
Price
$4502
$4598
$4839
$4995
/package
Ratings
(6)
(426)
(4)
(10)
Size5/16 in5/16 in#105/16 in
Screw Length2-3/4 in3-1/8 in3-1/8 in4 in
Fastener PlatingBrassCoatedBrassBrass
Drive StyleTorxStarTorxTorx
Package Quantity100100236100
Interior/ExteriorExterior,InteriorExterior,InteriorExterior,InteriorExterior,Interior
Head StyleRound HeadLow Profile WasherLow Profile WasherRound Head
Finish FamilyBrassYellowBrassBrass
FeaturesACQ Rated,CoatedACQ Rated,Coated,Self Drilling,Self TappingACQ Rated,CoatedACQ Rated,Coated
View ProductView ProductView ProductView Product

Specifications

Dimensions

Screw Length
3-1/8 in
Thread Pitch (mm)
0 mm
Threads Per Inch (TPI)
0

Details

Color Family
Yellow
Drive Style
Star
Fastener Plating
Coated
Fastener Thread Type
W-Cut
Fastener Type
Wood Screw
Fastener/Connector Material
Steel
Features
ACQ Rated,Coated,Self Drilling,Self Tapping
Finish
Climatek
Finish Family
Yellow
Grade
AC257
Head Style
Low Profile Washer
Included
Driver Bit
Interior/Exterior
Exterior,Interior
Measurement Standard
SAE
Package Quantity
100
Product Weight (lb.)
0.035
Returnable
90-Day
Size
5/16 in

Warranty / Certifications

Manufacturer Warranty
ITW Brands warrants that this product is free from defects in material and workmanship. ITW Brands sole liability for any breach of this warranty shall be to replace this product or refund the purchase price. ITW Brands shall not be liable for any fastening failure due to improper installation or defective substrate material.

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 4.9
    out of 430 reviews
  • 96% recommend this product
Filter by:
Showing 1-30 of 430 reviews
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
    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
    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 people found this 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 person found this helpful
    Like the screws, T30 tip design doesn't strip out . Threads grab well and using lower speed 1 the...
    Like the screws, T30 tip design doesn't strip out . Threads grab well and using lower speed 1 the torque draws boards up tight. I Used hundred or so on my barn project. Expensive but worth it
    by
    • Verified Purchase
    • Recommended
    Although this product was not what I had intended to purchase (I was looking for #10 or #12 screw...
    Although this product was not what I had intended to purchase (I was looking for #10 or #12 screws in 4-in or 4.5" lengths), they worked well for my project. I wish there were MORE options such as variability in package/qty sizes. I bought these (which were a larger OD than I initially intended) because the qty in the package was more suited to my needs. I'd buy again.
    by
    • Verified Purchase
    • Recommended
    Solid.
    Solid.
    by
    • Verified Purchase
    • Recommended
    I needed some long, sturdy screws to construct a Lego table for my grandson. These fasteners work...
    I needed some long, sturdy screws to construct a Lego table for my grandson. These fasteners worked great. Nice coarse threads for gripping and developing strength. The project was constructed with Oak lumber and plywood so I drilled pilot holes for the threads and shank to prevent splitting and allow good compression of the joints. There is currently an industrial style that seems to be popular call steam punk, where metal rivets, pipes, rods and industrial components are intentionally incorporated and left exposed. I wouldn't classify my project as steam punk, but I liked the idea of leaving expose fasteners and wood on this Lego project for effect. The large screw heads and coating on the screws gave it an exposed brass industrial look that went well with my project.
    by
    • Verified Purchase
    • Recommended
    1 person found this helpful
    Doesn’t split wood drives in completely and correctly the first time! Awesome product!
    Doesn’t split wood drives in completely and correctly the first time! Awesome product!
    by
    • Verified Purchase
    • Recommended
    GRK fasteners are a superior fastener and ,in my opinion , the best quality and value fastener av...
    GRK fasteners are a superior fastener and ,in my opinion , the best quality and value fastener available today. I have been involved in construction and DIY projects for 60 years (I recently celebrated my 76th birthday). I recently have been installing a small deck in the front of my home. As usual the GRK RSS structural screws I am using for this project meet and exceed my expectations. They bite and drive quickly and have incredible holding power.
    by
    • DIY
    • Verified Purchase
    • Recommended
    1 person found this helpful
    No need for pre-drilling, my 14v drill could handle the torque easily. The screw head recesses ni...
    No need for pre-drilling, my 14v drill could handle the torque easily. The screw head recesses nicely in Pine without need to counterbore. Definitely just as strong as a lag screw.
    by
    • 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.
    by
    • Pro
    • Recommended
    Insanely heavy duty. I'm not a structural contractor or someone who needs these to hold up a hou...
    Insanely heavy duty. I'm not a structural contractor or someone who needs these to hold up a house, but I hung a few heavy shelves by driving these screws into studs. Wow, I'm sure the wall will fall down before these screws give up.
    by
    • DIY
    • Recommended
    3 people found this helpful
    I needed to replace the fence around my farm and the wife wanted fence boards on 5" wood fence po...
    I needed to replace the fence around my farm and the wife wanted fence boards on 5" wood fence posts. I used a 3/16" pilot hole so I could align the ends of the 1" x 6" PT fence boards and keep the screw going straight. These are an engineering marvel, the shaft hole cutter keeps it from binding in the board, the washered head also has a cutter to recess it into the wood to avoid compressing, makes a nice clean looking attachment.
    by
      • Recommended
      7 people found this helpful
      Move over lag scews!
      These are a GREAT replacement for either lag bolts or screws! Simple and strong! Real easy way to attach a 4x4 to 2x4 stock, or vica versa! When attaching 4x4's to 2x4's I usually used a lag screw, which meant I had to drill both pieces being joined. With GRK wood fasteners, I let the self-tapping system do the work for me! Easy and QUICK! If you are doing outside construction, these are a time saver! Try them, I am sure you will like em!
      by
      • Recommended
      1 person found this helpful
      Strong Screws
      Excellent quality, very strong.
      by
      • Verified Purchase
      • Recommended
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                    Good I suppose....GRK the over kill...
                    Good I suppose....GRK the over kill
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                          Great holding strength
                          Great holding strength
                          by
                          • Verified Purchase
                          These are my favorite. I buy these instead of lag...
                          These are my favorite. I buy these instead of lag bolts. They are amazing.
                          by
                            Showing 1-30 of 430 reviews