Use GRK Bit T-30Self-Tapping W-cut thread designZip-TipPatented Climatek coatingLag Screw Alternative
Included with (100) GRK Fasteners 12225 5/16" x 4" T-30 RSS Rugged Structural Screws. The RSS Fasteners are Ideal for Carrying Beam, Playground Equipment, Ledger Board, Deck Posts, and Stair Rails. AC257 Treated Lumber Approved (IBC/IRC Code Compliant ESR #2442). Made with a Climak All-Weather Cloating, No Pre-Drilling, Low Torque, and Recessed Star Drive.
Brand: GRK, Model: ICC-ESR-2442, Size: 5/16" x 4"