GRK has modified its innovative FIN/Trim™ Head Screw to include reverse threading under the head of the fastener. After extensive testing, GRK has found that the reverse thread on the RT Composite™ Trim Head Screw helps the screw disappear beneath the surface of the wood composite material, reducing or eliminating the dimple that sometimes appears when using the FIN/Trim™ Screw.

GRK's RT Composite™ Trim Head Screws are ideal for most fine carpentry applications, and are recommended for most composite decking projects and climates. The reverse thread feature is available in sizes from 2 inch to 3-1/8 inch.

The RT Composite™ Trim Head screw's exceptionally small head, along with the W-Cut thread design, prevent most material splitting. Pre-drilling is only necessary if the building material's limitations require a pilot hole to be drilled. (Always consult wood supplier's / manufacturer's recommendations)

RT Composite™ Trim Head screws come with 1200+ salt spray hours Climatek corrosion protection. This will come in very handy when using our Trim screws in composite decking.

FOR BEST RESULTS, TRIM SCREWS SHOULD BE DRIVEN AT HALF SPEED.

Reverse Thread (RT) Trim Head Screws by GRK Fasteners At-A-Glance:
Works with composite decking, wood decking, window jambs, door jambs and all rim applications
Strong heads and Star head recess
NO pre-drilling
Reverse Thread (RT)
Most composite decks