For use with an externally threaded item that measures 5/8 inch and has 11 threads per inchPackage contains 10 piecesHeight: .54"Hex Socket Drive 15/16"Zinc plated steel offers good corrosion resistance in many environmentsHex nuts are used with mating screws and bolts to help secure items. They have a hex-shaped body, which has flats that can be gripped with a wrench for turning to tighten and untighten in fastening applications. Allowing for easy assembly and disassembly, hexagonal or hexagon nuts are the most common nut type.