Product used to fasten hurricane/storm panels to concrete, block or wood structurals when a protruding stud is desired. Just drill and drive, no need to countersink. Features an oversized 1/4-20 threaded stud (1-1/8" long) on anchor accepts standard wing nuts and allows easy adjustment to fine-tune panel attachment. 5-1/2" long, #14 diameter, V-notched fastener ensures a strong joint. Stalgard finish provides outstanding corrosion resistance (withstands 1000 hours in salt spray testing per ASTM B117 standards). Meets TDI and Miami-Dade County hurricane standards. TDI approval documentation pending.SKU: HFNT550 $0.96