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Old 05-27-2010, 02:58 PM
Rudolf_Diesel Rudolf_Diesel is offline
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Join Date: May 2009
Location: Southern California
Posts: 106
If the head is 10mm it is most likely a M6x1.0 - if it were a 13mm head, then it would be a M8x1.25. Grades in metric 8.8 ~ grade 5, 10.9 ~ grade 8.
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