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Just took off my wheels that I sold to another member and 19 lug nuts came right off. The nut on the left needed an impact wrench to come off and stripped a good number of threads on the wheel stud:

 This was the only nut in a batch of 20 with a machine stamp on either side of the lower flared edge, 4 dots around an X. I can't help but wonder if this was a quality control mark and that it was defective to begin with.I threaded the nuts on by hand and torqued them all equally. All of the stud threads were in good condition when the OEM lugs came off. Any ideas?
 "Too dumb for opera, too smart for NASCAR." |
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