Simpson Strong-Tie #12 x 1-3/4" Self-Drilling TB Wood-To-Steel Screw, Square Flat Head - Black Phosphate, Qty. 50 Grade 55 Threaded Rod Self-Drilling Tip: No pre-drilling required

Self-Drilling Tip: No pre-drilling required when fastening into 18–22 gauge steel

For Engineered Wood: Use Strong-Drive SDS Heavy-Duty Connector screws where specified

Strong Hold: Great for both tension and shear loads in concrete or block

Web Stiffeners are required for all I-joists used with these hangers

(40) STN22 Hex Head Washers

Simpson Strong-Tie #12 x 1-3/4" Self-Drilling TB Wood-To-Steel Screw, Square Flat Head - Black Phosphate, Qty. 50 Grade 55 Threaded Rod Self-Drilling Tip: No pre-drilling requiredThe Simpson Strong Tie TBP1245R50 Strong Drive TB Wood to Steel Screw with black phosphate coating is designed for high performance fastening of wood to steel in interior, dry environments. This structural screw features a flat head with under head nibs for clean countersinking, a #4 drill point with wings to eliminate wood splitting, and a 6 lobe recess for controlled driving torque. The black phosphate finish provides smooth driving and a clean