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 a good angle granularity for approaching a tool. Good Fastening Performance: These long nuts used for mounting bolts, studs or machine screws for fixing two pieces together. Wide Applications: These long shank hex nuts can be widely used for home and office, hardware communication, ship assembly and other machinery industries. 5pcs/set Long Rod Nut Hex Coupling Nuts carbon steel hex sleeve nut spacer M10 threaded fasteners Specification: < /p> Material: carbon steel Surface treatment: galvanized Product Dimension: M104013 (mm) Package List: 5*Long Nuts< /p>