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https://www.mccoys.com/shop/p/3662079-052303-12/grk-fasteners-rt-series-16630-screw-8-thread-2-12-in-l-reverse-thread-trim-head-star-drive-steel-505-pail
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GRK Fasteners

RT 16630 Screw, #8 Thread, 2-1/2 in L, Reverse Thread, Trim Head, Star Drive, Zip-Tip Point, Steel, 505 PK

Sku: 3662079-052303-12
$90.27
6 Available at SHIP TO STORE
Estimated Arrival On: 02/01/2026

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.

  • Reverse spiral flutes engineered to provide maximum gripping power to easily remove broken, damaged or rusted nuts, bolts and screws
  • Tri-metal shock-resistant brazing for extreme impact and maximum durability
  • Zip-Tip™ no pre-drilling, faster penetration
  • S3 technology double hardens the blade edge for increased cutting life
  • Climatek™ coated screws provide corrosion-resistance in pressure treated wood with corrosive ground contact
  • Case hardened steel for high-tensile, torque and shear strength
  • W-Cut™ low-torque, faster drive

Thread Size
#8
Length
2-1/2
Thread Type
Reverse
Head Type
Trim
Drive Type
Star
Point Type
Zip-Tip
Material
Steel
Package Quantity
505
Thread Length
1.575
Drive Size
T10
Color
White
Applicable Materials
Composite, Wood
Shear Strength
360
Tensile Strength
499

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