GRK 10221 UberGrade Rugged Structural Screw, 5/16" x 3-1/8", 500-Count

GRK's RSS Rugged Structural 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. RSS screws which are 3-1/8" and longer have a six threaded CEE thread that enlarges the screw hole for the non-threaded portion of the fastener, allowing the wood to settle easily and increasing 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.

• 500 count
• Recessed star drive zero stripping, with 6 points of contact
• CEE thread for a clean finished look
• W-Cut low torque and faster drive
• Zip-Tip no pre-drilling, faster penetration
• Cutting pockets provide a clean hole, reduces splitting and bore with precision
• Case hardened steel for high tensile, torque and shear strength
• For interior/exterior use
• Climatek coating is AC257 code approved for use in treated lumber
• Washer head for immense holding power
• Package type: Box.

Specifications

• Series: RSS
  
• Type: Rugged
  
• Screw size: 5/16"
  
• Length Under Head: 3-1/8 in
• Head Style: Washer
• Drive size: T30
• Thread type: CEE
• Finish: Climatek coated
• Drive type: Recessed Star.