10-9X1 Square Recess Round Washer Head Deep Thread Wood Screw Full Thread Zinc (Pack Qty 4,000) BC-1016DQRWD

The deeper thread design offers greater resistance to pull-out forces. The head offers a greater bearing surface than a countersunk design. Used to attach surface-mounted door hinges or lock hasps into dense woods or when attaching two pieces of wo C1022 case-hardened steel Rockwell C 45 minimim