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Does anybody know what bolt size I need for those gas tank straps on an 81ish chevy c30? I lost one of the bolts and the other bolt is kind of a pain to take off an on again.

volare
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  • What is the head size of the one which remains? If it's a 9/16" head, it's more than likely a 3/8"-16 thread. You'd just have to ensure the bolt is long enough. If you can give me the head size, I can figure out what the thread is for you. – Pᴀᴜʟsᴛᴇʀ2 Apr 01 '19 at 16:34
  • sorry my bad, its a knut that goes on the end of one these things https://www.1aauto.com/fuel-tank-with-strap-set/i/1afrk00014?f=445498&y=1981&utm_campaign=gb_csv_br&utm_content=FRK&gclid=Cj0KCQjw7YblBRDFARIsAKkK-dK_Va2_gdHb4FIuS68o57htvYLLdNz91My_82gBhMIrm6teyOihbdkaAkTbEALw_wcB – volare Apr 01 '19 at 16:35
  • Still, what is the head size of the nut (or opposing bolt)? – Pᴀᴜʟsᴛᴇʀ2 Apr 01 '19 at 16:36
  • It is a 5/8 head – volare Apr 01 '19 at 16:45
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    It is most likely a 7/16"-14 thread. Most nuts/bolts of this type are coarse threaded. I'm surprised, though ... usually these are captured nuts, to make installation easier. You sure something isn't rusted through? – Pᴀᴜʟsᴛᴇʀ2 Apr 01 '19 at 16:50
  • There are also about three metal braces with a bunch of other bolts. they're in pretty bad shape. I think the two straps hold it tight. – volare Apr 01 '19 at 16:59
  • Some good ie in focus images with a ruler for scale would help. – Solar Mike Apr 02 '19 at 05:27
  • I have seen 5/8 head nuts for a 3/8 stud before. – Moab Apr 06 '19 at 00:52
  • I found a pair of 7/16"-14 nuts. We'll see if it fits probably today or tomorrow. That should make the truck start right?? jk...we have a lot more to do. – volare Apr 08 '19 at 12:45

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Annnnd the winner is 3/8-16. Thanks for playing folks.

volare
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