Maintenance free boltingWith IHF fasteners and ITH bolt tensioning cylinders - for steel construction or wind turbines
ITH standard fastenersBolts, nuts and washers for all industrial applications M20 to W510 (3/4" to 20")
ITH Roundnuts RMS / RMZ Up to 40% higher preloads allow to optimize bolt connection designs
Extending the required projecting thread for to use the hydraulic, torsion- and friction-free tensioning. Existing bolts can remain.
ITH Fasteners: Bolts, nuts and washers
As a worldwide leading whole system supplier in bolting technology, ITH offers a wide range of fasteners. The scope of fastener supply includes bolts, nuts, and washers in different designs and configurations.
Designing bolted joints
Bolted joints can be designed by ITH. Being a whole system supplier ITH has the capabilities to consider more than only the joint itself during the design process:
- Technical specifications
- Bolting method (torque or tension)
- Assembly restrictions
By considering the whole picture and with experienced know-how, ITH Bolting Technology designs technically efficient bolted joints. Technical specifications, bolting tools used, and the assembly restrictions are considered to create the best technical and cost-effective solution for customers.
Overview about ITH fasteners
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ITH industrial fasteners M20 up to W510 (3/4'' up to 20'') in varius surface treatments | materials | configurations
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Up to 40% higher preloads allow to use smaller bolt dimensions or designing bolt connections more compact. Both save costs.
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Maintenance free bolt connections on wind turbines: The innovative IHF Fastener system substitues conventional bolt connections.
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When retrofitting bolt connections to the hydraulic tensioning method a certain projecting thread above the nut is required. If not available this projecting thread can be achieved by the use of ITH Tension Nuts. Existing bolts can be kept and do not have to be replaced.
Complete sets of fasteners for industrial applications
ITH has the capacity to deliver complete sets of fasteners for different industry sectors.
Comparison ITH Fasteners - Nuts
ITH Quality Management of fasteners
High quality and traceability
The ITH quality-management system is certified according to the strict regulations of ISO 9001. This regulation specifies that the raw bar steel has to be supplied by reputable approved steel manufacturers, correctly heat-treated, tested, and ultrasonically inspected.
In order to guarantee traceability, each individual bar is subjected to spectrographic analysis before entry into our stock.
In the case of special alloys or special customer requirements, the steel supplier receives a specification which must be met. The supplier's certificates are checked for compliance with the order specification, and if the result of the spectrographic analysis is satisfactory the material is released for storage or production.
At ITH, safety-critical fastening elements are tagged with a special number code which makes it possible to trace the material back to its producer. Depending on customer requirements, acceptance testing can be carried out at ITH by any of the following organizations:
- American Bureau of Shipping (ABS)
- Germanischer Lloyd (GL)
- Bureau Veritas (BV)
- Technischer Überwachungsverein (TÜV)
- Det Norske Veritas (DNV)
- Lloyds’ Register (LR)
- Maritime Register of Shipping (RS)
- and more
Contact your local person in charge
Use the ITH global network to find your local person in charge.
Objective technical advice
Being a whole system supplier we are not determined to one specific bolting method - Therefore we advise you objectively and offer the best technical and cost-effective solution.
Contact us for a free consultation
Contact us on any questions regarding your bolt connection or for any technical questions. We advise you free of charge and offer a free on-site inspection.