December 31, 2002, the Shanghai maglev trains are running for the first time, this is a new milestone in the history of the development of human traffic, attracted worldwide attention.Maglev train speed can reach 500 km/h, this is the land transportation of the fastest speed.In high speed running, maglev trains of rail steel beams to inherit from 0 to 2000 Hertz, high frequency variation of strong vibration.To solve in high frequency vibration of the rail steel fasteners loose on the problem, select the three sets of fastening solutions in operation, 30 ° variable tooth type locknut column in it.After 90 days of commissioning, 30 ° tooth type locknut showed excellent properties of locking, 30 ° of rail steel beam type variable tooth locknut no nut loose and fall off, has provided the safeguard for the safe running of the maglev train, and replaced the other two fastening solutions.