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  • Flat head cup square neck bolt

Flat head cup square neck bolt

This kind of bolt belongs to the heterosexual bolt, generally does not need to be annealed, if the bolt diameter is large (M24 or more), annealing can be chosen before processing. If it is not a die part, the square diameter of flat head needs milling machine processing, and the threads and threads need lathe processing. Heat treatment is also required if strength is required.