RSS 5/16 X 3-1/8 BULK Type Deck Screw Head Type Round Finish Climatek Material Steel Screw Size 5/16 in Fastener Length 3 1/8 in Drive Torx Drive Size T30 System of Measurement Inch Application For Structural Decking Heavy Duty Framing Interior/Exterior Remodeling Ledger Boards Multi-ply LVL Fastening Dimensional Standards ESR-2442 ICC-ES AC257