GRK Fasteners RSS 12231 Structural Screw, 5/16 in Thread, 5-1/8 in L, Washer Head, Star Drive, Steel, 50 PK

GRK Fasteners RSS 12231 Structural Screw, 5/16 in Thread, 5-1/8 in L, Washer Head, Star Drive, Steel, 50 PK

SKU: RSS516-518HP

Brand: GRK Fasteners

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GRK's RSST screw is made of specially hardened steel to provide you with high tensile, torque and shear strength. The sharp threads and points bite instantly into the material (including hardwood), reducing the splitting effect due to smaller shanks. RSST screws that are 3-1/8 in and longer have CEE threads which enlarge the screw hole for the non-threaded portion of the fastener, allowing the wood to settle easily and increases the screw's drawing strength. The CEE thread also reduces the friction on the screw shank which can result in lowering the driving torque and the likelihood of splitting the wood. This is why the RSST screw is an efficient lag screw alternative. Our round head with built-in shield (washer type head) has no sharp edges like conventional lag screws. The added shoulder (nominal diameter) underneath the washer has the ability to center the RSST screw in pre-drilled hardware like hinges and connector plates.

Product Details


Manufacturer's Part Number: 12231

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Product Features

  • W-Cut™ low torque, faster drive
  • Washer head for immense holding power
  • Zip-Tip™ no pre-drilling, faster penetration
  • CEE Thread™ enlarges hole to reduce splitting
  • Recessed star drive zero stripping, with six points of contact
  • Case hardened steel for high tensile, torque and shear strength
  • Climatek™ coating is AC257 code approved for use in treated lumber
  • Cutting pockets provide a clean hole and reduces splitting and bore with precision

Product Specifications

Applicable Materials Wood
Drive Size T-30
Drive Type Star
Head Type Washer
Length 5-1/8 in
Material Steel
Package Quantity 50 PK
Shear Strength 2948 lb
Tensile Strength 4247 lb
Thread Length 3-1/2 in
Thread Size 5/16 in

Product Documents

Catalog Click here to download
Line Drawing Click here to download
Specification Sheet Click here to download