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| | | | bigedpa (Mar 29th 2020) | | Total Likes: 1 | |  Re: Bolt thread pitch #1352204 Mar 29th a 04:17 AM | | by klhansen | | klhansen |
Many times, fine thread bolts are Grade 8 versus Grade 5, although Grade 5 are also available in fine thread.
Frame bolts would also likely be Grade 8 for strength in critical areas. I would be reluctant to replace a fine thread bolt with a Grade 5 coarse thread. Unless you can be sure, I would treat all coarse thread bolts as Grade 5.
Check to see if there are head markings on the bolts you remove to determine the the grade.
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