8X4 Flat Head (no nibs) Square Recess Deep Thread Wood Screw 2/3 Threaded Black Oxide (Pack Qty 1,000) BC-0864DQFDB

The deeper thread design offers greater resistance to pull-out forces. The square drive increases productivity with excellent torque transmission C1022 case-hardened steel Rockwell C 45 minimimYou may also like 5/16-12X1 1/2 A/F.428-.437 HD Hgt.172-.190 Slotted Indented Hex Washer Serrate Self Drill Full Thread Zinc (Pack Qty 600) BC-312407KSWS.