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GRK Fasteners White RT Composite™ Exterior Trim Screw (#8 X 2-1/2")

GRK Fasteners

The White RT Composite™ Exterior Trim Head screw is a specially designed fastener for attaching composite and cellular PVC materials. The reverse threading under the head of the fastener helps the screw head disappear beneath the surface of the material while preventing mushrooming and eliminating dimples for a smooth, even surface. 


  • Recessed Star Drive
    Eliminates stripping with 6 points of contact
  • Trim Head
    For a clean, finished look
  • Underhead Reverse Thread
    Design prevents mushrooming to create an even surface

Additional Features

  • W-Cut™: For low torque and smoother drive 
  • Zip-Tip™: Eliminates pre-drilling   
  • Available in Climatek™ or white Climatek™ coating
  • Some sizes also available in 305 Stainless Steel 


  • cPVC Deck Boards
  • Exterior Trim
  • Hidden Fastening

Additional Applications

  • Interior/exterior use
  • Composite trim
  • cPVC
  • Door/window jambs
  • Composite decking  

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