Nuts and Bolts

Design and manufacture of trusted products to suit individual end-use purposes

Nuts and Bolts

The products described here are a sample. We manufacture products using the most advanced equipment to meet the needs of our customers after receiving their drawings and specifications.

The products described here are a sample. We manufacture products using the most advanced equipment to meet the needs of our customers after receiving their drawings and specifications.

Alloy Steel Precision Bolts

Takenaka’s alloy steel precision bolts are nuts and bolts with high strength, high tensile strength, toughness and resistance to high temperature, high pressure, rust, low temperature, and abrasion.

Alloy Steel Precision Bolts01
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ねじアイコンmajor applications
  • ■ nuclear power plant
  • ■ oil refinery and chemical plant
  • ■ natural gas
  • ■ special purpose ships
  • ■ fresh water making equipment
  • ■ coal liquefaction equipment
ねじアイコンmajor material
  • JIS
    • ■ alloy steel bolting materials for high temperature service(SNB)
    • ■ stainless steel (SUS)
    • ■ heat-resisting steel(SUH)
    • ■ nickel, chromium, molybdenum-containing alloy steel(SCM,SNCM)
    • ■ carbon steel(S〇〇C)
    • ■ Structural bolts (4.6,8.8,10.9 etc.)
  • ASTM
    • ■ A193
    • ■ A194
    • ■ A320
    • ■ A307
    • ■ A563
    • ■ A325(F3125)
    • ASTM,ASME,AISI,ISO,DIN etc. (For further details, please cotact to us.)
ねじアイコンsize nominal diameter:6mm~500mm length;10mm~5,000mmsize other than the above size, please cotact to us.
ねじアイコンapplicable coating and surface treatment
  • ■ our coated products(TAKECOAT®-1000, TAKECOAT® CERAMIC , NANOTECT®)
  • ■ hot-dip galvanizing
  • ■ electro galvanizing(yellow chromate, trivalent chromate)
  • ■ electroless nickel plating
  • ■ phosphate coating treatment
  • ■ black finishing
  • ■ silver plating
  • ■ calorizing
  • ■ aluminized α
  • ■ nitriding treatment
  • ■ dacrotized
  • coating other than the above, please cotact to us.

Hot-forged Bolts

We use hot forging to manufacture these nuts and bolts with high tensile strength, toughness, high strength, corrosion resistance, and abrasion resistance to withstand high and low temperatures.

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Hot-forged Bolts02
Hot-forged Bolts03
ねじアイコンmajor applications
  • ■ bridge
  • ■ subway
  • ■ offshore structure
  • ■ port structure
  • ■ hydroelectric and thermal, nuclear power plant
  • ■ tower of wind power
  • ■ heavy industry
  • ■ chemical industry
We have delivered large numbers of the tower flange bolts used in wind turbine towers in recent years.
ねじアイコンmajor material
  • JIS
    • ■ Alloy steel bolting materials for high temperature service(SNB)
    • ■ Stainless steel (SUS)
    • ■ Heat-resisting steel(SUH)
    • ■ Nickel, chromium, molybdenum-containing alloy steel(SCM,SNCM)
    • ■ Carbon steel(S〇〇C)
    • ■ Structural bolts (4.6,8.8,10.9 etc.)
    • ■ high-tension bolts(F8T,F10T,10T-SUS)etc
  • ASTM
    • ■ A193
    • ■ A194
    • ■ A320
    • ■ A307
    • ■ A563
    • ■ A325(F3125)ASTM
    • ■ ASME
    • ■ AISI
    • ■ ISO
    • ■ DIN etc.(For further details, please cotact to us.)
ねじアイコンsize nominal diameter:10mm~80mm length;30mm~700mmsize other than the above size, please cotact to us.
ねじアイコンapplicable coating and surface treatment
  • ■ our coated products(TAKECOAT®-1000, TAKECOAT® CERAMIC , NANOTECT®)
  • ■ hot-dip galvanizing
  • ■ electro galvanizing(yellow chromate, trivalent chromate)
  • ■ electroless nickel plating
  • ■ phosphate coating treatment
  • ■ black finishing
  • ■ silver plating
  • ■ calorizing
  • ■ aluminized α
  • ■ nitriding treatment
  • ■ dacrotized
  • coating other than the above, please cotact to us.

Super (Special) alloy steel precision bolt

These nuts and bolts withstand use in especially harsh conditions, for example, ultra-high temperatures, ultra-low temperatures, and high pressure, and they have high strength as well as corrosion, heat, and abrasion resistance. These alloy steel precision bolts (super alloy) are the result of joint development between Takenaka’s technical unit and Mitsubushi Materials Co., Ltd. (now Hitachi Metals, Ltd.) The forge and heat treatment equipment for these bolts were all designed for purpose. We take pride in the fact that our capacity for quality across a wide range of manufacturing areas is unrivalled.

Alloy Steel Precision Bolts
ねじアイコンmajor applications
  • ■ nuclear power plant
  • ■ thermal power plant
  • ■ coal liquefaction equipment
  • ■ power generation of gas turbine
  • ■ oil refinery plant・chemical plant
  • ■ fresh water making equipment etc.
ねじアイコンmajor material
  • ■ superalloy(ex. high nickel, duplex stainless steel etc.)
  • ■ titanium alloy
  • ■ aluminium alloy
  • ■ copper alloy
ねじアイコンsize nominal diameter:6mm~100mm length:5mm~1000mmsize other than the above size, please cotact to us.

Other Products

Takenaka also brings in the most advanced equipment, principally NC (Numerically Controlled) lathes and machining centers. Combining these cutting and processing technologies enables us to make products with complex shapes, not just screws.

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