中野ボールト工場 Product Lineup

The greatest strength of Nakano Bolt Factory Co., Ltd. lies in the manufacturing of bolts utilizing "hot forging technology." Hot forging is a method of processing metal while it is heated and in a flexible state. Using this method, our company manufactures bolts with various shapes of heads. We have a team of veteran craftsmen skilled in mold making, enabling us to create even special bolts. In the past, we have a track record of producing a single bolt, and our ability to manufacture small lots and a variety of products is one of the reasons why we are chosen by customers. 【Features of Hot Forging】 ■ Can manufacture complex shapes ■ No internal defects and high strength *For more details, please refer to the PDF document or feel free to contact us.

• bolt
• Contract manufacturing

Nakano Bolt Factory Co., Ltd. is a bolt manufacturer registered as a testing factory by the Japan Water Works Association (registered in June 1973). To be registered as a "Japan Water Works Association Testing Factory," it must meet standards equivalent to JIS. Since it is drinking water that we consume daily, strict standards are set to prevent health hazards due to defective bolts. *For more details, please refer to the PDF document or feel free to contact us.

• bolt
• Contract manufacturing

Nakano Bolt Factory is a comprehensive manufacturer of bolts. We mainly manufacture and sell bolts used in the fields of civil engineering, construction, steelmaking, shipbuilding, and railways, responding to increasingly complex and advanced needs year by year. Recently, our products are being used not only domestically but also in overseas railways. Additionally, we are a certified factory of the "Japan Water Works Association Inspection Factory," which is considered difficult to obtain. Utilizing our strongest asset, "hot forging technology," we are committed to creating precise and flexible products every day. 【Strengths】 ■ Experts in bolts ■ Strong in custom-made products ■ Integrated production system *For more details, please refer to the PDF document or feel free to contact us.

• bolt
• Contract manufacturing

The Nakano Bolt Factory manufactures bolts used in water pipes as an inspection factory certified by the Japan Water Works Association. Strict standards are set to ensure that the tap water we consume daily is not adversely affected by defective bolts (such as dimensional abnormalities or insufficient strength). As a certified factory, we undergo regular inspections from the Japan Water Works Association, which includes on-site checks and product evaluations, ensuring that we always manufacture bolts in a fully compliant environment. 【Bolt Manufacturing Process】 1. Cutting: Cutting iron materials of about 6 meters into the required lengths. 2. Forging: Heating the cut pieces with heavy oil to shape the heads of the bolts. 3. Burr Removal: Removing burrs that form around the heads of the bolts during forging. 4. Upsetting: Reducing the diameter of the bolt by upsetting part of it. 5. Thread Rolling: Performing thread processing on the upset section of the bolt. *For more details, please refer to the PDF document or feel free to contact us.

• bolt
• Contract manufacturing

Our company uses hot forging technology, which involves heating metal to a flexible state for processing, to manufacture bolts with various head shapes. We have skilled craftsmen specializing in mold making, allowing us to create even special bolts. Additionally, we have a proven track record of producing even a single bolt in the past, which is one of the reasons our company is chosen for small lot and diverse production. 【Features】 ■ Capable of manufacturing complex shapes ■ High strength with no internal defects *For more details, please feel free to contact us.

• bolt
• Contract manufacturing