10-9X1 1/4 Square Phillips Drive Round Washer Deep Thread Type17 2/3 Thread Zinc (Pack Qty 3,300) BC-1020DXRW17

An externally threaded fastener with a dome-shaped head and an integrally formed washer; a recess that can accommodate either a Phillips or Square screwdriver; and a single lead thread. The shank has a reduced diameter and a chip cavity cut out where the final several threads, ending at the tip 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. The head offers a greater bearing surface than a counte