Full thread Flat Head Screw - Patented Multi-head design featuring ribs on
the underside of the head for a clean, flush or countersunk
penetration into wood, sheet metal, masonry and plastics. These
are coarse thread screws, made of carbon steel, available in a
silver zinc or yellow zinc finish (more sizes available in
silver). Thread serrations reduce the torque required to fully
drive these screws. For use with either a Phillips or Square
Drive bit. Spax discontinued mfg of all #12 screws beginning in 2020. Sale is limited to supply on hand. Engineered in Germany....made in USA.