10X4 6 Lobe Flat Nibs Deck Screw Type 17 2/3 Thread Zinc 1,000HR Salt Spray (Pack Qty 500) BC-1064DTF17HC

An externally threaded fastener with a dome-shaped head and an integrally formed washer, a square socket recess that will also accomodate a standard Phillips driver, a shank with a reduced diameter and a single lead thread. The head is approximately 33% larger than that of a typical round washer screw of the same nominal diameter. 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 extra large head (a) allows for precise adjustment