Field of activity

The production of threaded rods

Threaded bolt are the flagship product of NAKAUMI, with over 60 years of experience specializing in their production. Therefore, threaded bolt manufactured by NAKAUMI are always controlled through highly specialized processes, ensuring consistent quality and optimal production costs.

NAKAUMI specializes in manufacturing: all threaded bolt, single-end threaded bolt, double-end threaded bolt, right-hand threaded bolt, and left-hand threaded bolt.

Additionally, NAKAUMI also provides customized processing of special-shaped products related to threaded bolt upon request, such as chemical threaded bolt, chamfered threaded bolt, threaded bolt with plate, …