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Model #96085

Store SKU #1000037107

#8 x 1-1/2 in. R4 Multi-Purpose Star Drive Flat Head Screw (110 per Pack)

$1298
  • Faster Drive for Improved Productivity
  • Fast Bite Tip provides a fast start for one-step installation
  • For interior / exterior use
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Product Details

GRK's R4 Self Countersinking screw has 6 self-contained cutting pockets which act like a router and transport the drill dust away from the edge of the screw hole. They also widen the countersink hole only around the head shape. The screw head top closes the hole exactly, leaving no damaged fibers around the wider area of the head. The R4 head design is so effective that it will not crack even the most brittle materials.
  • For use in wood, particle-board, cement fiberboard, plastic, sheet metal
  • Self-tapping
  • Self-countersinking head
  • No pre-drilling
  • No stripped heads
  • Common project applications: remodeling, fencing, storage, cabinets, framing
  • Return Policy
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Specifications

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Questions & Answers

16Questions
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Q:Would this fastener be adequate or appropriate to install T1-11 siding on the gables of my log home?
by|Nov 13, 2022
0 Answer
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Q:Can I use these to fastened my one and a half inch pine treads to my interior staircase. The screw will go through a metal stringer and then into the tread.
by|Oct 23, 2022
2 Answers
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A:  No you need a longer screw

by|Oct 27, 2022

    A:  Sorry Rochhie, but with your fairly vague information, I’d have to say no. If you’re fastening 1-1/2 thick pine treads to metal supports, and if this is a deck and not an refined interior project, it may be better to use stainless or outdoor protected coated screws designed for self drilling and tapping metal. They must be long enough to pass through the supports so that an ample number of threads are through the metal, best if the screw heads are just below the tread’s surface and a good outdoor finish used for weather protection, especially using “softwood” as you said “pine”.  Stair construction is serious when it comes to safety and failure is not an option, especially for insurance companies. 

    by|Oct 25, 2022
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      Q:i love these screws..can you use these in drywall (i ask because they kind of grab like drywall screws...just wondering)..what would be the fence screw's indoor silver counterpart? thx!
      by|Sep 18, 2022
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      Q:torx driver vs r4 bit
      by|Apr 15, 2022
      2 Answers
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      A:  T15 is included you can purchase an extra at Home depot in a variety of lengths

      by|Apr 22, 2022

        A:  The bit required is a T-15 and the box comes with one.

        by|Apr 19, 2022
          Showing 1-4 of 16
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          Customer Reviews

          4.9 out of 5
          (255)
          • 4.9
            out of 255 reviews
          • 95%recommend this product
          Filter by:
          Showing 1-10 of 255 reviews
          Work as advertised!
          I used the included drill bit and have fastened about 160 of these babies into wood fence posts. Not one screw has stripped, and the self-tap works well. Very pleased with the quality.
          by
          • Verified Purchase
          • Recommended
          Amazing
          Grk screw containers clip into the rail system from rail mounted hardware bins, see photo
          by
            • Recommended
            Thisbis the third time I have used the GRK brand screws as they are great fasteners. The first t...
            Thisbis the third time I have used the GRK brand screws as they are great fasteners. The first time I used GRK brand fasteners I was attaching thin hard wood boards from pallets to a building as siding. The fasteners used previously were the thinnest deck screws but each needed predrilled or the would split at the ends. When I switched to the GRK brand screws the trim heads worked fine and held the boards in place without splitting. The next use with the GRK brand screws were withe an earlier addition on the deck I used the R4 General Purpose screw which worked very well going through the 1 x 3 pine firring stripps used for a lightweight deck. And finnaly the current project an addition to the existing deck in which I'm using the GRK cabinet screws in which I bought purley out of curiosity on its holding power. In all events I was impressed with several things 1 comes with a functiong bit. 2 the heads were resistant to stripping out. 3 the ease of which each screw passes through the wood and grounds the meeting wood pieces to each other. Creating a firm fastening capable of being walked on without pulling out.
            by
            • Verified Purchase
            • Recommended
            2 found this review helpful
            by
            • Verified Purchase
            Good product and drive very good without stripping.
            Very good screws and good heads on them.They drive in great without stripping.I recommend them as they are a good product.
            by
            • Verified Purchase
            • Recommended
            Excellent Product
            These are easier to drive then typical Philips head screws.
            by
            • Verified Purchase
            Screws working just fine....
            Screws working just fine.
            by
            • Verified Purchase
            by
            • Verified Purchase
            by
            • Verified Purchase
            Perfect length and strength for the project I was working...
            Perfect length and strength for the project I was working on
            by
            • Verified Purchase
            Showing 1-10 of 255 reviews

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            Ratings
            (255)
            (411)
            (1680)
            (51)
            Screw Length1-1/2 in2-1/2 in2-1/2 in2-3/4 in
            Size#8#8#8#8
            Drive StyleStarStarStarStar
            Head StyleFlat UndercutTrimWasher HeadRound Head
            Fastener/Connector MaterialSteelSteelSteelSteel
            Interior/ExteriorExterior,InteriorExterior,InteriorInteriorExterior,Interior
            Package Quantity110100100100
            FeaturesACQ Rated,Coated,Self Drilling,Self TappingACQ Rated,Coated,Self Drilling,Self TappingACQ Rated,Coated,Self Drilling,Self TappingACQ Rated,Coated,Self Drilling,Self Tapping
            THD SO SKU 1001193535
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