Zinc Plated Carbon Steel: These coupling nuts are zinc plated carbon steel with high strength and good corrosion resistance. Hexagonal: The long nuts have adopted a 6-sided hexagonal shape which gives good angle granularity for approaching a tool. Good Fastening Performance: These long nuts used for mounting bolts, studs or machine screws for fastening two parts together. Wide Applications: These long shank hex nuts can be widely used for home and office, communication equipment, ship assembly and other machinery industries. 5pcs/set Long Rod Nut Hex Coupling Nuts Carbon Steel Hex Sleeve Nut Spacer M10 Threaded Fasteners Specification: Material: carbon steel Surface treatment: galvanized Product dimension: M104013(mm) Package List: 5 * Long Nuts