5/16 in. x 5-1/8 in. Star Drive Low Head Washer Rugged Structural Wood Screw (40-Piece per Pack)
$3567
- Easy to install lag screw alternative
- Integrated washer head allows for maximum clamping force
- For interior / exterior use
- View More Details
How to Get It
Frequently Bought Together
Price:
$3567
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
Additional Resources
From the Manufacturer
Compare Similar Lag Bolts
 | |  |  | |
| Brand | GRK | GRK Fasteners | GRK | GRK |
| Name | 1/4 in. x 2-1/2 in. Star Drive Low Profile Washer Head Structural Wood Screw (50-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 6 in. Star Drive Low Profile Washer Head Wood Screw (25-Pack) | 5/16 in. x 3-1/8 in. Star Drive Low Profile Washer Head Structural Wood Screw (100-Pack) |
| Price | $1798 | $3567 | $3568 | $4364 |
| Ratings | (544) | (544) | (544) | (544) |
| Size | 1/4 in | 5/16 in | 5/16 in | 5/16 in |
| Screw Length | 2-1/2 in | 5-1/8 in | 6 in | 3-1/8 in |
| Fastener Plating | Coated | Coated | Coated | Coated |
| Drive Style | Star | Star | Star | Star |
| Package Quantity | 50 | 40 | 25 | 100 |
| Interior/Exterior | Exterior,Interior | Exterior,Interior | Exterior,Interior | Exterior,Interior |
| Fastener/Connector Material | Steel | Steel | Steel | Steel |
| Head Style | Low Profile Washer | Low Profile Washer | Low Profile Washer | Low Profile Washer |
| Finish Family | Yellow | Yellow | Yellow | Yellow |
| View Product | View Product | View Product | View Product |
Specifications
Dimensions
Screw Length
5-1/8 in
Thread Pitch (mm)
3.5 mm
Threads Per Inch (TPI)
7.2
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
Oct 18, 2021
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
May 8, 2021
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
Jun 24, 2020
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
Jun 10, 2020
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
Apr 22, 2020
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
Dec 24, 2019
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
Dec 24, 2019
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
Aug 27, 2019
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
Jul 23, 2019
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
Jun 18, 2019
Solid.
Solid.
by
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