Sanohatsu Co., Ltd.
Asaka-Shi, JP
Sanohatsu Co., Ltd. Patent applications | ||
Patent application number | Title | Published |
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20120070247 | Method for manufacturing fastening screw and fastening screw - An object of the present invention is to reduce the fastening time and to obtain a predetermined fastening force and to suppress the loosening of a screw. The solution of the present invention is to provide a method for manufacturing a fastening screw, which comprises: a preliminary upsetting step B for forging a front end of a blank wire | 03-22-2012 |