Simpson Strong-Tie #14 x 3" Self-Drilling TF Wood-To-Steel Screw, Star Flat Head - Black Phosphate, Collated, Qty. 750 WP/HWP/HWPH/WMU Purlin Top-Flange Hangers Not recommended for treated lumber

Not recommended for treated lumber or highly corrosive environments

including those involving treated lumber

eliminating the need for predrilling and simplifying the installation process

Compatible with Wood and Metal: Designed for fastening plywood

Simpson Strong-Tie #14 x 3" Self-Drilling TF Wood-To-Steel Screw, Star Flat Head - Black Phosphate, Collated, Qty. 750 WP/HWP/HWPH/WMU Purlin Top-Flange Hangers Not recommended for treated lumberThe Simpson Strong Tie TFP1475S TF Wood to Steel Collated Screw with black phosphate coating is designed for rapid installation of wood sheathing, subflooring, or wood framing to cold formed steel. These collated screws feature a flat head with nibs and a sharp point, optimized for high speed, consistent driving with minimal installation torque. Ideal for indoor structural applications, the black phosphate coating offers moderate corrosion resistance