Japan developed the world's smallest scroll bolt

Japan's KSS Corporation will soon introduce a world smallest spherical bolt with a shaft diameter of 1.8 mm and a reed 0.5 mm.
This kind of bolt was developed to meet the trend of miniaturization and high precision in the manufacturing of medical and communications equipment. At present, the rolling bolts sold on the Japanese market have a shaft outer diameter of 2.5 mm and a tongue spring of 1 mm. In addition, the company has also developed tools for use with these bolts.

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