Features Robust Material: These hex nuts are made of zinc plated carbon steel material, which provides strength and zinc cover offers good co-rrosion resistance. Hex Nut: Hexagonal Nut has 6 sides that gives a good granularity of angles for a tool to approach from. Applications: M6 x 40 Long Rod Nut is used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry. Used for: Carbon steel long hex coupling nut can be used to fit bolts, studs or machine screws for fastening two parts together to make them one piece. Fastener Nut: These hex nuts will be great replacement for industrial and construction fasteners. Features: 1. These hex nuts are made of zinc plated carbon steel material, which provides strength and zinc cover offers good co-rrosion resistance. 2. Hexagonal shape has 6 sides that gives a good granularity of angles for a tool to approach from. 3. These hex nuts will be great replacement for industrial and construction fasteners. 4. Used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry. 5. Used to fit bolts, studs or machine screws for fastening two parts together to make them one piece. Specification: Product material: carbon steel Sur-face treatment: galvanized Quantity: 5pcs Type: M6 * 40 Package list: 5 * Standoff Package List