Previously unsolved fastening problems at dynamically highly stressed threaded joints have lead to the development of the FS All-Steel Lock-Nut. It has a flexible, fully threaded locking element which is fitted into the nut body; thus offering double security at the highest standard. 

IAs opposed to competitors' lock-nuts, the FS All-Steel Lock-Nut can be applied universally. Thanks to its patented design which combines all the elements required for a safe threaded connection such as re-usability, heat resistance, protection of the counter thread and a narrow tolerance of the locking torque.

The FS All-Steel Lock-Nut can be re-used numerous times without suffering a significant loss of its locking capability. Even after tightening and loosening the lock-nut 15 times, it still exceeds the required values stated in the DIN EN ISO 2320.

Basic Advantages

• The FS All-Steel Lock-Nut offers double security as the locking element works in both radial and axial direction and causes an even pinch effect to affect the whole width (360°) of the screw thread.

• The locking element contains an offset standard thread which prevents the counter thread from getting damaged.  
• Economical storage thanks to universal applicability. 

Assembly Advantages

• Economical, space-saving and automatable assembly instead of castellated nuts with split pins, clamping nuts, counter nuts etc. 

Technical Advantages

• During manufacturing the clamping force can be adjusted to very narrow tolerances as required. d
• The FS All-Steel Lock-Nut can withstand temperatures of up to 1000°C. For application in temperatures higher than 300°C suitable heat-resistant materials are used to suit the specific circumstance. 
• A high resistance to stripping is warranted as the load bearing threads comply with the standard DIN EN ISO 2320.
• FS All-Steel Lock-Nuts comply with standards DIN EN ISO 7042 / DIN EN ISO 10512, DIN 6925, DIN 980 M and DIN 6927 / DIN EN ISO 1667 / DIN EN ISO 1664 (flange nut). Special height-reduced designs are possible.

Benefits

• Reliable even in complicated screwed connections such as on turbochargers, exhaust manifolds, catalysts, highly stressed gearboxes, compressors and vibrating machine components.
• The FS All-Steel Lock-Nut has proven itself over many years and has created a host of new solutions to old problems.
• Modern heat treatment technologies achieve a higher corrosion resistance than was previously possibly by galvanizing without inducing hydrogen embrittlement. 

Technical Fakts

Other measurements, materials and designs are available on request.

FS All-Steel Lock-Nut - Application examples

Cerfificates

Deutsche Bahn Q1 Supplier Status

ISO/TS 16949: Manufacture of Fasteners, Cold Formed Parts, ...