dewalt dfm12720 ultracon hwh 1 4 x 1 1 4 qty 100DeWalt DFM12720 Ultracon+ 1 4" X 1 1 4" Blue Hex Washer, Gimlet, Box Of 100 ULTRACON+ HEX WASHER HEAD BLUE CONCRETE SCREW ANCHOR. The UltraCon+ fastening system is a complete family of screw anchors for light to medium duty applications in concrete, masonry block, brick, and wood base materials. The UltraCon+ is fast and easy to install and provides a neat, finished appearance. The UltraCon+ screw anchor is engineered with matched tolerance drill bits