TECHNICAL

Pre-Load Bolt Assemblies  HRC BS EN 14399-10:2018

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Features of High Strength 10.9 HRC Bolting Assemblies

Developed for more simplified bolt fastening and more accurate performance.

  1. Controlled clamping force can be ensured. 
     

  2. Completion of bolt fastening can be confirmed by the shear-off of the notched end of the bolt. 
     

  3. Removes the possibility of operator error.
     

  4. Fastening can easily be done by electric wrench. 
     

  5. Noiseless installation and no need of wrench adjustment. 
     

  6. The bolt does not rotate when fastening. 

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BS EN 14399-10 HRD

Nut Marking

The bolt reacts to the fastening torque and the notched end of the bolt shears off. The required clamping force is thus given.

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BS EN 14399-10 HRD NUT

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Quality Assurance

No treatments such as T-Washing or Etching can be applied before installation as this will change the tightening characteristics and prevent the correct preload being achieved. 

 

The components of the assembly, as supplied, have 

been tested as a batch and must not be mixed with 

components from any other batch of HRC assemblies. 

 

Care must always be taken to avoid any contamination of the assemblies with anything that may change the lubrication of the nut, bolt thread or washer. 

 

SUCH CONTAMINATION WILL EFFECT THE ASSEMBLY PRELOAD THAT IS ACHIEVED DURING TIGHTENING.

 

We would advise that tightening of HRC assemblies is avoided in the rain.

BS EN 14399-10 HRD

Nut Marking

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BS EN 14399-6 HV Washer

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BS EN 14399-6 HV

Washer Marking