GRK Fasteners RSS Series 13231 Rugged Structural Screw, 5/16 in Thread, 5-1/8 in L, Coarse, Partial Thread, Washer Head

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Easy to install lag alternative. Zero stripping recessed star drive. Cee thread for a clean finished look. W-Cut for low torque, smoother drive. ZIP-TIP for no pre-drilling, faster penetration. Washer head provides immense holding power. Cutting pockets provide a clean hole, reduces splitting, and bore with precision. ESR-3201 Approved for structural application. Climatek Coated: AC257 code approved for use in treated lumber. For interior/exterior use in: carrying beams, ledger boards, stair rails, deck posts, playground equipment and other professional applications.

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  • Indivually Tagged
  • Size x Lgth In : 5/16 x 5-1/8
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    Product Details

    Applicable Materials: Wood
    Drive Size: T30
    Drive Type: Star
    Finish: Climatek
    Head Type: Washer
    Length: 5-1/8 in
    Material: Steel
    Point Type: Type 17
    Shear Strength: 982 lbf
    Tensile Strength: 1415 lbf
    Thread Length: 3-3/8 in
    Thread Size: 5/16 in
    Thread Type: Coarse Partial


  • Recessed star drive, zero stripping, with six points of contact
  • CEE thread, enlarges hole to reduce splitting, install torque
  • W-Cutâ„¢, low torque, smoother drive, reduce splitting
  • Zip-Tipâ„¢, no pre-drilling, faster penetration and reduce splitting
  • Cutting pockets provide a clean hole, reduces splitting and bore with precision
  • Case hardened steel for high-tensile, torque and shear strength
  • Climatekâ„¢ coating is AC257 code approved for use in treated lumber
  • Washer head for immense holding power
  • ESR-2442 Approved for structural application
  • SKU: 7213267
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