25C500ATF,concrete screw, self-tapping concrete screw, concrete screws, con-sert screw, consert screw, confast screw, ruff-nex, kwik-con, tapper, titan, masonry screw, blue screw, cement screw, stainless steel concrete screw;concrete screw, self-tapping concrete screw, concrete screws, con-sert screw, consert screw, confast screw, ruff-nex, kwik-con, tapper, titan, masonry screw, blue screw, cement screw, stainless steel concrete screw,1/4 X 5 FLAT HD PH TAPCON ANCHOR SC,Jugenheimer Industrial Supplies, Inc.