Patent ID: 8793857

Claim:
A method for locking a nut with an inner thread, comprising the steps of: heating a nut having an inner thread and formed from a material having known values of ultimate tensile strength (Rm) and yield strength (Re) corresponding to a first plurality of temperatures, and wherein the material of the nut also has a relative plastic interval corresponding to each temperature of the first plurality of temperatures, said relative plastic interval being defined by the formula (Rm−Re)/Rm where Rm and Re are determined from the known values corresponding to temperatures, and wherein the material further has an optimal heating temperature at which a maximum of a relative plastic interval of the material of the nut occurs, obtaining a maximum heating time for a temperature within a first range of temperatures including the first plurality of temperatures, above which the nut presents a risk of deterioration of a microstructure of the nut or of an initial mechanical strength of the nut, wherein heating the nut includes heating the nut to a temperature within a second range of temperatures defined between 80% and 120% of the optimal heating temperature, the temperature being expressed in ° C., and for a heating time of less than said maximum heating time so that the initial microstructure and mechanical strength of the material constituting the nut are preserved, deforming a body of the nut locally by bending once the nut has been heated to the temperature within the second range of temperatures.