ASTM A307 High Strength Hexagon Bolt 

      Bolt: Mechanical component, a cylindrical threaded fastener equipped with a nut. It is a type of fastener consisting of a head and a screw (a cylindrical body with external threads) that needs to be matched with a nut to fasten and connect two parts with through holes. This type of connection is called bolt connection. If the nut is unscrewed from the bolt, it can separate the two parts, so bolt connection is a detachable connection.       When connecting, it is necessary to unscrew the nut from the bolt to separate these two parts, and then fix them onto the connecting piece. Installing the nut onto the bolt can provide a good tightening effect.High Strength Hexagon Bolt,High Strength Allen Bolt,High Strength Hexagon Bolts The service life of bolts 1. The lifespan that can be used is not fixed, but depends on the environment in which it is located. If it is in a normal environment, it can be used for about ten years, but if it is in a h…