Shinjo Manufacturing Co., Ltd. started as a manufacturer to supply the nuts to automotive industry instantaneously after World War II. We successfully developed the cold forming process of weld nut as the first case in the world, and gradually it evolved to high volume production by cold-forming which now allows us to manufacture 100 million pieces per month.

Besides, due to the demand of weight saving, we duly developed PIAS NUT that fixes to a thin sheet with sufficient strength, thereby, we became the world’s leading manufacturer for its automatic feeding system while expanding our business to Europe and USA.

In 1960’s, we, a specialized company of nut, entered to another category to manufacture male screws for the first time in screw manufacturing history, meanwhile we acquired the patent of self-drilling screws that had been newly introduced to the market at that time, in order to respond to the mass-production by the same cold working. We named it PIAS Screw that hailed around the world with its high-quality evidence.