Nitto Seiko Co., Ltd. engages in the manufacture and sale of industrial fasteners and assembly machines. It operates through the following segments: Fastener, Assembly Machinery, and Control Equipment. The Fastener segment provides fasteners for industrial use and metal products such as screw manufacturing tools. The Assembly Machinery segment manufactures general machinery such as automatic screw tighteners and automatic assembly machines. The Control Equipment segment offers flow meters, measurement and instrumentation system products, and ground survey machines. The company was founded on February 11, 1938 and is headquartered in Ayabe, Japan.