6-13X1 1/4 Flat Head Nibbed Square Recess Deep Thread Wood Screw Type 17 2/3 Thread Black Oxide (Pack Qty 7,000) BC-0620DQF17DB

The deeper thread design offers greater resistance to pull-out forces. The chip cavity (or auger point) enables the fastener to drive—especially in denser woods—without pre-drilling a pilot hole C1022 case-hardened steel Rockwell C 45 minimim