Drive with Speed, Quality, and Confidence

You are here : Products  >  Composite Trim  >  RT Composite™

RT Composite™ Exterior Trim Screws

Install Right the First Time

Interior / Exterior Use: Zero Stripping, with 6 points of contact
Recessed Star Drive: eliminates mushrooming
Trim Head: for a clean finished look
W-Cut™: Low torque, smoother drive
Zip-Tip™: No pre-drilling, faster penetration
ESR-3201 Approved for structural application
Case Hardened Steel:for high tensile, torque and shear strength
Climatek™ Coating is AC257 code approved for use in treated lumber
For interior/exterior use in; exterior PVC trim (Azek, Kleer, Koma), no pre-drilling is necessary. Climatek™ coated screws work well with CAMO system.
Available in Climatek™ or white powder coated finish.
Also available in PHEINOX™ 305 grade Stainless Steel.

GRK has modified its innovative FIN/Trim™ Head screw to include reverse threading under the head of the fastener. This technology makes the RT Composite Trim Screw ideal for use in composite and cellular PVC trim.

Based on extensive tests, GRK has found that the reverse thread helps the screw head disappear beneath the surface of the classic wood composite material, reducing or eliminating the dimple that sometimes appears when using the FIN/Trim™ screw.

The reverse thread feature is available in RT Composite™ screws from 2" to 3-1/8" in length in both regular Climatek™ coating and in white powder coated finish to blend in with popular white exterior composite and cellular PVC trim.

Product Sheet


GRK Headquarters

GRK Fasteners USA
ITW Renovations / Remodeling
155 Harlem Avenue, Building N3E
Glenview, IL 60025
Tel: 877-489-2726
Fax: 847-619-8403

GRK Fasteners Canada
ITW Construction Products
120 Travail Road
Markham, ON L3S 3J1
Tel: 800-263-0463
Fax: 800-895-5160