The machine tool,used for producing M6-M30 hexagon nuts,flange nuts,squre nuts,and other nonstandard nuts with big specifications,whose outlines conform to the GB61-86 standard,has large range of application,and second-grade precision.Our factory can design the treading device for making nut with other can design the threwading device for making nut with other nonstandard specification for users. The machine tool with reasonable and simple structure,has six principal axis,and it is easy to adjust and maintenance. The cutting tool that the machine tool users is nut tap,and the users can order form the tool factory.