james750 Posted December 13, 2009 Share Posted December 13, 2009 What is the size/thread pitch of the factory bumper bolts? I need to replace the bolts that have the welded nut inside the frame. Link to comment Share on other sites More sharing options...
Pete M Posted December 13, 2009 Share Posted December 13, 2009 seems to be 2 different ones over the years. some are metric, others are standard. :( I've yet to find what trucks had what. My 88 had metric. Link to comment Share on other sites More sharing options...
james750 Posted December 13, 2009 Author Share Posted December 13, 2009 My 90 had metric. Do you know which size the metric was? Link to comment Share on other sites More sharing options...
Pete M Posted December 13, 2009 Share Posted December 13, 2009 not offhand. have you checked the bolt thread in the DIY forum? Link to comment Share on other sites More sharing options...
james750 Posted December 13, 2009 Author Share Posted December 13, 2009 Wasn't in the DIY bolt thread... Link to comment Share on other sites More sharing options...
Eagle Posted December 13, 2009 Share Posted December 13, 2009 I'm pretty sure they are 10mm but I don't remember the thread pitch. Link to comment Share on other sites More sharing options...
james750 Posted December 13, 2009 Author Share Posted December 13, 2009 Yeah, they are 10mm, but I'm not sure what the thread pitch is either... :hmm: Link to comment Share on other sites More sharing options...
Pete M Posted December 13, 2009 Share Posted December 13, 2009 do metrics have only fine and coarse? if so, they are fine. get the strongest ones you can find. Even if that means the dealership. Link to comment Share on other sites More sharing options...
freakjeep93 Posted December 13, 2009 Share Posted December 13, 2009 yea metric is fine and coarse nothing else Link to comment Share on other sites More sharing options...
james750 Posted December 13, 2009 Author Share Posted December 13, 2009 I found one of the broken off pieces of bolt from a year ago when I installed this bumper. They are 10mm with a 1.5 thread pitch. I got 10.9 grade bolts as well as grade 8 SAE bolts to replace the craptastic 8.8 grade metric hardware I have been using for the last year. The reason for this whole bolt issue was that about a year ago the front of my truck was hit, all 6 front bumper bolts sheared off (thank god that those gave rather than the frame), I lost all 4 of the front factory welded nuts, but fortunately the nuts in the frame rail didn't break free, after a year of running a JCR prerunner bumper with only the front 2 mounting bolts held on with 8.8 hardware as well as the tie in brackets (I know, bad idea), I finally got everything upgraded. Now I won't cringe every time that I am recovering a Jeep wondering if the bumper will hang on. :D Link to comment Share on other sites More sharing options...
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