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5/16 in. x 5-1/8 in. Star Drive Low Head Washer Rugged Structural Wood Screw (40-Piece per Pack)

$3430
/box
  • 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:
$3430

Product Overview

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
  • Self-tapping
  • W-cut thread design
  • May be used as a lag screw alternative

Info & Guides

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Compare Similar Lag Bolts

5/16 in. x 3-1/8 in. Star Drive Washer Head Rugged Structural Wood Screw (45-Pack)
current product
5/16 in. x 5-1/8 in. Star Drive Low Head Washer Rugged Structural Wood Screw (40-Piece per Pack)
5/16 in. x 3-1/8 in. Star Drive Low Profile Washer Head Structural Wood Screw (100-Pack)5/16 in. x 4 in. Star Drive Washer Head RSS Structural Screws (100-Pack)
BrandGRK FastenersGRK FastenersGRKGRK Fasteners
Name5/16 in. x 3-1/8 in. Star Drive Washer Head Rugged Structural Wood Screw (45-Pack)5/16 in. x 5-1/8 in. Star Drive Low Head Washer Rugged Structural Wood Screw (40-Piece per Pack)5/16 in. x 3-1/8 in. Star Drive Low Profile Washer Head Structural Wood Screw (100-Pack)5/16 in. x 4 in. Star Drive Washer Head RSS Structural Screws (100-Pack)
Price
$2298
$3430
/box
$4598
$4995
/package
Ratings
(430)
(430)
(430)
(10)
Size5/16 in5/16 in5/16 in5/16 in
Screw Length3-1/8 in5-1/8 in3-1/8 in4 in
Fastener PlatingCoatedCoatedCoatedBrass
Drive StyleStarStarStarTorx
Package Quantity4540100100
Interior/ExteriorExterior,InteriorExterior,InteriorExterior,InteriorExterior,Interior
Head StyleWasher HeadLow Profile WasherLow Profile WasherRound Head
Finish FamilyYellowYellowYellowBrass
FeaturesCoatedACQ Rated,CoatedACQ Rated,Coated,Self Drilling,Self TappingACQ Rated,Coated
View ProductView ProductView ProductView Product

Specifications

Dimensions

Screw Length
5-1/8 in
Thread Pitch
0

Details

Color Family
Yellow
Drive Style
Star
Fastener Plating
Coated
Fastener Thread Type
Standard
Fastener Type
Wood Screw
Fastener/Connector Material
Steel
Features
ACQ Rated,Coated
Finish
Climatek corrosion resistant coating
Finish Family
Yellow
Grade
AC257
Head Style
Low Profile Washer
Included
Driver Bit
Interior/Exterior
Exterior,Interior
Measurement Standard
SAE
Package Quantity
40
Product Weight (lb.)
0.05 lb
Returnable
90-Day
Size
5/16 in

Warranty / Certifications

Manufacturer Warranty
No

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 431 reviews
  • 96% recommend this product
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Showing 1-30 of 431 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
      Rip city! Screws work better than I thought....
      Rip city! Screws work better than I thought.
      by
        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
                            Showing 1-30 of 431 reviews