TCM 1 1229-Howmet Fastening Systems – Portet sur Garonne (FR) EN4071-053

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2 Replies to “TCM 1 1229-Howmet Fastening Systems – Portet sur Garonne (FR) EN4071-053”

Julien Gauther says:

22/03/2022 at 3:04 pm

Since no fatigue tests were carried out on bolts due to bolt length (too short), could you please clearly add that we have a length restriction (up to 9 mm if I am not wrong)? However, this restriction is more or less visible in this qualification.

Dimensions:

As per EN4071, thread major diameter “dmax” shall be equal to D1min – 0,025.

D1min = D1 – 0,035. (MJ5x0,8)

Dmax = 5-0,035-0,025 = 4,940 mm

In dimensional test report (FAI), maximum major diameter = 5,000 mm (ISO5855-2).

Could you just please take into account this?

Hopefully, actual values are in line with dmax = 9,940 mm.

Many thanks in advance,
Best regards

Reply
1. Quentin BRETON says:
  
  23/03/2022 at 1:02 pm
  
  Good Afternoon Julien,
  
  Concerning the maximum requirement on thread major Ø, I do not consider this note as applicable because the EN4071-053 are D1 oversized bolts .
  D1 min is modified by the EN4016 to 5.265, so dmax should be 5.240mm, obtain such maximum thread major Ø is not possible.
  
  Have a nice day.
  Best regards,
  Quentin BRETON
  
  Reply