5/16-18 x 2-1/4" Star Drive Black Floor Board Saberdrive Screws

Diameter: 5/16"
Diameter 2: 9/16"
Length: 2-1/4"
Material: Steel
Finish: Black Phosphate
Head Style: Flat (T-40 Star Bit)
Point Type: Type F
Drill Size: 11/64" Hole
Thread Size: 18 (Coarse)
Type: Floor Board Screw
Application: Floor Board

The Ultimate Construction Screw - Fully specced for structural applications. Star and Hex Drive reduces Cam-out and for easy slip-free driving. Unique serrated thread for secure fastening. Most of our line offers a Type 17-point which eliminates the need for pre-drilling and reduces wood splitting. (Timber Screws, Hex Head Construction, & Ledger Screws are not equipped with Type 17-point). Exterior screws are encased with our premium XL 1500 coating to resist the environment, wood acids & treatment. Top quality alloy steel and are case hardened. Engineered to make them the best choice for professional and home use.