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Fasteners for Railway Engineering

Lederer provides railway engineering products for the assembly and long-term deployment of track and overhead contact line construction, bogies, superstructures and rail automation.


Katzbachstr. 4,
58256 Ennepetal,
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Lederer is the name to look out for when choosing a partner for fasteners and fastening technology. Think of Lederer when not only quality and service, but also reliability and added value in business relationships are important for you.

Lederer’s railway engineering product spectrum provides all of the elements that are required in the secure assembly and long-term deployment of track and overhead contact line construction, bogies, superstructures and rail automation.

Lederer has over 50 years of experience with continuous development in the fasteners market. All articles with relevance for fastening technology can be supplied within the company’s overall programme. These comprise not only those parts that are standardised in accordance with DIN and ISO, but also non-standardised fasteners, special parts manufactured in accordance with prototypes and drawings, and non-assortment articles.

Products for railway engineering fasteners and clamps

Lederer offers a large assortment of the most important products for fasteners and clamps in all areas of railway engineering. It also takes note of specific requirements that are particularly prominent in the industry.

Fasteners for rail automation.
C-parts to get you from A to B.
Fasteners for track and overhead contact line construction.
Fasteners for bogies and superstructures.

Lederer’s products include:

  • Overhead wire bolts
  • Splints
  • Tubular/blind rivets
  • Nuts
  • Rail nuts
  • Slot nuts
  • Flat washers
  • Nord-lock washers
  • Lock-washers/spring lock washers
  • Schnorr washers
  • Spherical washers
  • Spacers
  • DIN/ISO screws
  • Stirrup bolts
  • T-head bolts
  • Gaskets
  • Electrical incidentals
  • Articles based on customer’s drawings

Systematic quality analysis and assessments of railway fastenings

Consistently high quality is the top priority for Lederer. This applies to the quality of both products and services. All incoming and outgoing parts are subjected to a systematic quality analysis and assessment. Physical and chemical properties are examined using the latest measuring instruments and compared with the desired properties. These permanent tests mean that suppliers are required to deliver nothing but high-quality products. Lederer does not cooperate with manufacturers that fail to maintain the required standard.

If there is an appropriate individual agreement with the customer, the company can even carry out a 100% check. For example, each individual part is subjected to a test before it is dispatched from stock. In this way, even unusual and extremely exacting quality requirements can be fulfilled.

Examples of the criteria that can be examined include:

  • Dimensions
  • Coatings
  • Hardness in accordance with Rockwell (HRC) and Vickers (HV)
  • Screw thread
  • Material types

Railway fastening testing laboratory and certification

In addition to its quality assurance (QA) testing department, Lederer has its own testing laboratory accredited in accordance with ISO/IEC 17025. In this lab, even more detailed investigations can be carried out and certificates can be issued.

The Lederer testing laboratory also has the following possibilities at its disposal:

  • Tensile tests for full-size bolts and screws
  • Tensile tests under wedge loading
  • Proof load test for nuts
  • Breaking torque test
  • Drill speed test for self drilling screws
  • Hardness test for core and surface hardness
  • Miscellaneous manual tests
  • Salt spray tests
  • Issuing of test certificates 3.1C

Certificates and quality of service for rail fasteners

It goes without saying that Lederer not only tests the quality of its products, but also clearly defines the quality of its services. Quality management has been an established part of the Lederer corporate philosophy since 1993. Certification in accordance with DIN EN ISO 9001 (formerly 9002) guarantees a high standard of accuracy throughout all business segments. This means that more than 98% of all orders received can be delivered immediately and that transparency in all work processes is guaranteed for every employee.

These employees, incidentally, are the most important capital the company possesses, coming second to only the customers. Outstanding expertise, continuous ongoing training, and highly-developed customer orientation are key features of the entire Lederer team. The quality awareness that results from this forms the basis of lasting and successful dialogue with partners. It is no coincidence that renowned companies regularly rate Lederer as an A-grade supplier.

Process stability at every process stage is of paramount importance and a matter of course for the company. So far, Lederer has achieved:

  • Quality management in accordance with DIN EN ISO 9001
  • Environmental management in accordance with DIN EN ISO 140001
  • Work safety management in accordance with DIN ISO 45001
  • Management system requirements stipulated by IRIS

White Papers

  • Fasteners for railway engineering

    Leder's railway engineering product spectrum provides all the elements that are required in secure assembly and long-term deployment of track and overhead contact line construction.

Lederer GmbH
Katzbachstr. 4
58256 Ennepetal

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