Carbon steel material]: These nuts are made of carbon steel and the surface is galvanized, which has higher strength and is not easy to rust. They are essential parts for daily maintenance. [Function]: Cooperate with bolts, studs or machine screws to fix and connect two parts so that they become one part. [ Size]: Two sizes are available: M10 50 14; M10 40 13 (mm), please refer to the picture for the product size. [Hexagonal]: The nut is hexagonal and has 6 sides, which can be close to the angle of the tool. [Widely Used]: These long hex nuts can be widely used in machinery industries such as home and office, communication equipment, ship assembly, etc.