If I understand it would be a bolt that would be torqued to an initial value then final torqued using an angle torque meter as opposed to a specific setting? I'm only a diy mechanic but about the only time I heard of a single use bolt is a torque to yield bolt which can only be torqued once which I have no doubt you are familiar with.
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Frank M.
75 Firebird
68 Firebird 400 RAIII
66 Chevy II 461 Pontiac in AZ
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