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  • Users: Deltaengr
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  1. 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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