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Latest update: 27/04/2017 14:33:07

Fuji Seisakusho Co., Ltd.

We manufacture large machined nuts for nuclear power stations and plants.

We manufacture machined products related to nuts such as large machined nuts, lock nuts, intermediate insertion nuts and special machined nuts. We manufacture large machined nuts that other manufacturers cannot produce and a variety of nuts with particular specifications for use in major tightening applications related to nuclear power plants. Our products are meant for heavy use, including bridges, steel towers, vehicles, heavy machinery, transport equipment, base isolation systems for high-rise buildings, buildings, civil engineering, shipbuilding, machinery, railroads, expressways, and precision machinery. In recent years, we have developed lock nuts that are resistant to vibration and impact and provide steel nuts for intermediate insertion that can be made in any special sizes at the request of the customer.

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[Company strength]
We have been dedicated to the manufacturing of nuts, and nuts only, for the past 70 years. We provide products of high quality to customers using our excellent engineers who are certified as “highly skilled technicians” by the Japan Vocational Ability Development Association and our quality assurance system based on ISO 9001 and JIS certifications. We strictly implement 5S activities, welcome visitors to our factory from in and outside of Japan, and enjoy a high reputation. We won the Excellent Award in the Local and Social Category of the Higashi-Osaka City CSR Management Commendation and Eco Action 21 certification. Our large machined nuts are certified as “No. 1 product” among those with the Higashi-Osaka Brand status specified by Higashi-Osaka city. Our super high nuts are also certified as a “Plus Alpha Product.” We strive to be a local factory appreciated by both customers and local people.


[Business description]
We are a manufacturer of machined products related to nuts such as large machined nuts, lock nuts, intermediate insertion nuts and special machined nuts. We manufacture large machined nuts that other manufacturers cannot produce and a variety of nuts requiring sufficient precision and safety to be used in bonding materials for nuclear power plants. We develop lock nuts that are highly resistant to vibration or impact, nuts that can be inserted in intermediate positions, and other products that meet customers’ demands. We always have a stock of various materials including iron, stainless steel, carbon steel, chromium molybdenum steel, brass and other special steels and more than 10,000 kinds of nuts, so we can always supply nuts to our customers promptly. We receive orders and produce special-size nuts in quantities ranging from just one.

[Industry]
Manufacture of machined nuts, lock nuts, and intermediate insertion type nuts

[Strength of products/technologies]
We meet customers’ demands with our huge stock of more than 10,000 kinds of nuts made from various steels.
We are highly valued by customers who consider that our nuts that cannot be found elsewhere.
We have a strict product control system based on lot number and inspection system so that all products are sent to customers in perfect condition.
We keep steel inspection certificates (mill sheets), heat treatment inspection result charts, dimensional inspection result charts, QC process charts and all other inspection certificate documents.
We issue necessary documents when products are delivered and can also issue them after delivery.
Our nuts, supported by high quality and engineering capability, are used widely in a variety of large-scale projects.


[Representative's message]
We show our products at exhibitions in Japan about four times a year for publicity and sales channel expansion. We also place ads in various newspapers including Kinzoku Sangyo Shimbun, Fastening Journal, and Nikkan Kogyo Shimbun to advertise our new products. We renewed our website in June 2014 so that companies who are interested in our products after seeing our products at exhibitions or ads can visit our website for clear explanations of our new products.

[Company structure for market development/overseas expansion]
We have staff in the sales department dedicated to winning and serving new customers. They swiftly respond to any inquiries from companies.

[Market share/Ranking]
Market share of 50% in large machined nuts



[Awards and media coverage]
[Awards]
Excellent Award in the Local and Social Category of the Higashi-Osaka City CSR Management Commendation
300 of Japan’s Vibrant Monozukuri (Manufacturing) SMEs (2009)
Osaka Monozukuri Award (2008)

[Media]
Nijiiro Network of Higashi-Osaka Cable TV


[Authorization/Certification]
ISO 9001 certification
JIS certification 
Eco Action 21 certification


[Joint research and development]
Technology Research Institute of Osaka Prefecture (Fuji lock net) since 2009

[Intellectual property]
Registered patent “Fuji Triple Lock Nut” (patent no. 3629654) and two other patents and one patent pending

[Main Clients / Business History (domestic)]
Mitsubishi Nichiyu Forklift Co., Ltd. (Fuji bearing lock nut), Kobayashi Metals Ltd. (machined nuts), Sanwa Tekki Corp. (machine nuts), and many other companies related to the metal industry

[Exhibition History/Information]
We displayed our products at the New Value Creation Exhibition 2016 held at East Hall 2 and 3, Tokyo Big Site, from October 31 to November 2, 2016. Details will be provided later.

This company is recommended by the following support organizations.

Marketing Support Department, SMRJ
Kansai Head Office, SMRJ
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