QD 1-5/8 CEMENT BOARD SCREW REPLACES 79CB3BLG158S
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Simpson Strong-Tie 1-5/8 Galvanized Cement Board Screws. 1-5/8" length screw with undersized square drive and course high-low threads. Nibs under the head for easier countersinking. Type 17 point and 0.375 inchribbed wafer head coating with straight collation. Made for outdoor use."