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Recent content by Deltaengr

  1. Deltaengr

    Hi-lok cracking in threads

    1) The fasteners that failed were HL12V-8-10 and -13. They are being used with a HL75G-8AGW collar/spherical washer. We did not specifically check for straightness but we did inspect the hole and it was still within specification after removing the failed pin. I will take a look at others in...
  2. Deltaengr

    Hi-lok cracking in threads

    I forgot to note that the crack started in the root of first or second thread (shoulder end of threads).
  3. Deltaengr

    Hi-lok cracking in threads

    We have had a small number (4 out of 2000)of hi-lok fasteners fail during collar torqueing. The collar hex did not shear and the fastener failed. The failure mode was determined to be a bending induced crack which propogated to failure during collar torqueing. The installation is a 1/4" hi-lok...
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