Manual or Hand Torque Multipliers Electric Electronic Torque Wrenches Pneumatic Air Torque Wrenches Hydraulic Torque Wrenches and Power Packs, Flexible Shaft Machines Oilfree Air Nutrunners, Automatic shut-off angle torque wrenches, Dust shrouds

ITH Special bolts and nuts suitable for hydraulic bolt tensioning cylinders and other applications
As system supplier for bolting technology, ITH specialises in the design, manufacture and supply of special bolts and nuts larger than M20 (3/4").

Joining elements and their special tools are used in a wide variety of different fields such as:

  • high pressure vessels
  • the oil industry
  • motor construction (ship's diesel motors)
  • reactor construction (reactor valves)
  • turbine construction (gas, water and steam turbines)

IITH Special bolts and nuts suitable for hydraulic bolt tensioning cylinders and other applications

Photo Quality management
Quality management

The ITH ISO 9001 quality accreditation specifies that the steel bar raw material needs to be heat treated, tested by ultrasound and being supplied by a renowned steel manufacturer having the according accreditation for the respective steel quality themselves.

To avoid mix-ups, every single steel bar is being tested by a spectrum analysis before being placed into the designated stock area..

According to customers requirements we offer the availability to have all safety bolt items individually tested and certified by one of the following companies:

  • American Bureau of Shipping (ABS)
  • Germanische Lloyd
  • Bureau Veritas
  • Noske Veritas
  • TÜV

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Photo Production
Production All bolting elements are manufactured on state of the art CNC controlled machines with driven tool heads. This guarantuees a consistant quality of our products.
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Mechanical production
Mechanical production

Threads up to M180 (7 1/8") are made using the cold-rolling process, thereby achieving optimum surface qualities and high strengths.

Depending on dimension on material used the cold-rolling process is done in a continuous-flow or parting process. The cold-rolling solidifies the thread base more or less harder. The yield strength of the pin material within the edgenear range of thread flank and core roundness is thereby increased. At the same time the internal pressure is built up, overlaying later with the tensions and creating at total state of pressure that has a positive effect on the durability of the bolts.

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Materials
Materials

The materials listed below are only a representative sample of the range of materials processed by ITH. All other materials can be processed after consultation with ITH.

 

 

Tempering steels   High-temperature, extreme high-temperature steels
Abbreviation
Material no.
Equivalent ASTM
material no.
 
Abbreviation
Material no.
Equivalent ASTM
material no.
42CrMo4
1.7225
A519, SAE, AISI Grade 4140   24CrMo5
1.7258
A194 Gr.4
32CrMo12 1.7361     21CrMoV57 1.7709  
34CrNiMo6 1.6582     40CrMoV47 1.7711 A193 Gr. B16
30CrNiMo8 1.6580     X22CrMoV121 1.4923  
50CrV4 1.8159     X19CrMoVNbN111 1.4913  
        X8CrNiMoBNb1616 1.4986  
        NiCr20TiAl 2.4952  
Cryogenic steel   Stainless steels
Abbreviation
Material no.
Equivalent ASTM
material no.
 
Abbreviation
Material no.
Equivalent ASTM
material no.
26CrMo4
1.7219
    X20CrNi172
1.4057
 
X6CrNiTi1810 1.4541     X5CrNi172 1.4301  
X5CrMnNiN189 1.6909     X5CrMnNiN189 1.6909 UNS S30400, ASTM A213, A312
Special materials
Abbreviation
Material no.
Equivalent ASTM
material no.
Inco 718
2.4668
UNS NO 7718
Inco X-750 2.4669 UNS NO 7750
Nimonic 80 A 2.4952/2.4631 UNS NO 7080

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