Products

ASME certified nuts & bolts

Alloy Steel Precision Fasteners

Product Characteristics

Takenaka’s alloy steel precision fasteners are nut and bolt sets that are resistant to high temperatures, high pressure and corrosion. They are also made for low temperatures and high-tension conditions, with durability and resistance to wear and abrasion. Takenaka fasteners are used in atomic power plants, as well as oil refining and chemical plants, natural gas applications, special use ships, desalination equipment, coal liquefaction devices and many other applications. Our products meet customer needs in every industry and are developed from basic materials through continued research, and are produced using state-of-the-art equipment.

Alloy Steel Precision Fasteners

Fastener Standards and Steels for Major Producing Countries

ASME, ASTM, JIS, ISO, AISI, DIN, BS, AS, GOST and many more

Industry certification

ASME. JIS. NK .LLOYDS. AB. BV. NV. TUV. JPI. API. Approved by the Japan Water Works Association, ISO9001-2000

Available sizes

Bolt diameter: 10mm to 500 m/m
Length: 10m/m to 8000m/m

Recent Successful Customer Deliveries

Hokkaido Electric Power Company
Nut and bolt sets for the number 3 reactor at the Tomari Nuclear Power Plant
Chugoku Electric Power Company
Nut and bolt sets for the number 3 reactor at the Shimane Nuclear Power Plant
Hokuriku Electric Power Company
Nut and bolt sets for the number 2 reactor at the Shika Nuclear Power Plant

Fasteners for Reactors and Heat Exchangers

  • Kuwait National Petroleum Company: Nut and bolt sets for reactors
  • Sakai refinery of Cosmo Oil: Fasteners for heat exchangers

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Hot-forged Fasteners

Product Characteristics

Takenaka’s hot-forged nuts and bolts are manufactured with hot heading to provide resistance to high tension and high or low temperatures. They are also sturdy and resistant to corrosion as well as wear and abrasion. Takenaka’s hot-forged fasteners are used in bridges, subways, marine machinery and structures, harbor structures, power plants (hydroelectric, thermal and atomic), and heavy machinery industry and chemical industry applications.

Hot-forged Fasteners

Fastener Standards and Steels for Major Producing Countries

ASME. ASTM. JIS. ISO. AISI. AISC. DIN. BS. AS. GOST. and many more

Industry certification

Hexagon head bolt - JIS B 1180, high-strength hexagon head bolt - JIS B 1186, rivets - JIS B 1214, Certified by Ministry of Construction (Certificate No. 477) , Approved by the Japan Water Works Association

Available sizes

Bolt diameter: 10m/m to 80 m/m
Length: 10m/m to 700 m/m

Recent Successful Customer Deliveries

  • Tokyo Metro: Fukutoshin Line
  • Shuto Expressway: Yamate Tunnel
  • Keihan Electric Railway: Nakanoshima Line
  • Hanshin Electric Railway: Namba Line

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Alloy Steel Precision Fasteners

Product Characteristics

Takenaka’s nuts and bolts withstand use even in harsh conditions, such as ultra-high or -low temperatures, and high pressure. They are also resistant to corrosion, heat, wear and abrasion, and maintain their high strength even at high temperatures. These super alloy fasteners were created through a collaborative development between Takenaka’s engineering team and Mitsubishi Materials, and Takenaka independently designed all of the specialized hot molding and thermal processing equipment to manufacture these special products. Covering a wide range of manufacturing, Takenaka takes pride in the fact that they maintain a distance between themselves and their competitors in their capacity to produce high-quality products. Major uses include equipment for atomic reactors, thermal power plants, coal liquefaction devices, gas turbine generators, oil refining and chemical plants, and desalination equipment.

Alloy Steel Precision Fasteners

Major Alloys Produced

High nickel alloys, nickel-copper alloys, cobalt alloys, high nickel iron-base alloys, copper alloys, aluminum alloys, titanium alloys and zirconium alloys

Available sizes

Bolt diameter: 3m/m to 200 m/m
Length: 5m/m to 3000 m/m

Recent Successful Customer Deliveries

  • Saudi Arabia: Fasteners for use in seawater pumps for a large desalination plant
  • Thermal power plant: Fasteners for use in control valves
  • Turbine: Casing bolts

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