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Unread 01-23-2014, 02:43 PM   #1
bpounds
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Leaf spring hardware

Been searching, and can't find the definite answers. I'm ordering springs for the YJ and I want to replace all the bolts in the shackles and the frame eye. I'm expecting to have to cut some bolts to get them out, but even if I don't I would like new bolts and bushings.

What bolt diameter and pitch for the shackle end?

What bolt diameter and pitch for the frame eye end?

Not worried about length, I can easily measure that, and I know it can vary depending on shackle thickness.

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Unread 01-23-2014, 03:06 PM   #2
Randonexplosion
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9/16". Thread pitch shouldnt matter as long as you get nuts to match.
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Unread 01-23-2014, 03:07 PM   #3
Jeepsr4me
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You dont need pitch. Cause if you replacing the bolt, the nut also should be changed.
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Unread 01-23-2014, 03:17 PM   #4
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Quote:
Originally Posted by Randonexplosion View Post
9/16". Thread pitch shouldnt matter as long as you get nuts to match.
For which? I see references to the shackle end being different than the end attached to the frame.

Quote:
Originally Posted by Jeepsr4me View Post
You dont need pitch. Cause if you replacing the bolt, the nut also should be changed.
Correct, I just wondered if stock was course or fine thread.
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Unread 01-23-2014, 03:23 PM   #5
1320yj
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If you are getting shackle bolts get greasable ones. They sell them on EBay
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Unread 01-23-2014, 03:28 PM   #6
Randonexplosion
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After a quick search Mr. Bolty says 1/2" on shackle end.
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Unread 01-23-2014, 03:42 PM   #7
87duker
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9/16 towards center and 1/2 for shackle end. Just put new ones in mine.
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Unread 01-24-2014, 08:29 AM   #8
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I crawled around under Mauser and confirmed the bolts I will need.

Frame spring mounts are 9/16-12NC and need 4" length.

Upper and lower shackle bolts are 1/2-20NF and need 4.5" length. That length will work with 3/8" thick shackles.

Ordered all that including washers and nylock nuts from McMaster. All grade 8.
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Unread 01-24-2014, 04:13 PM   #9
rstoltenberg1
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Where did you get your leafs? My stock ones are sitting flat and there are so many options and stuff available, with different price's everywhere.
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Unread 01-24-2014, 04:16 PM   #10
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I'm going with Zone Offroad kit.
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Unread 01-24-2014, 05:15 PM   #11
The_Goob
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4" wont hit the nylon if you use nylock nuts and 3/8 shackles. ask me how I know. I used 1/2"x4 1/2" with I believe 13 thread count. the stock ones were a finer thread
Granted I used g8 washers on both sides too
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Unread 01-24-2014, 06:21 PM   #12
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Quote:
Originally Posted by The_Goob View Post
4" wont hit the nylon if you use nylock nuts and 3/8 shackles. ask me how I know. I used 1/2"x4 1/2" with I believe 13 thread count. the stock ones were a finer thread
Granted I used g8 washers on both sides too
I'm not sure if you are disagreeing with my measurements, or just confirming. But I noted 4" for the fixed frame end. Shackle thickness is irrelevant on that end. On the shackle end, you want 4.5" long, as I noted. So we agree.
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Unread 01-24-2014, 07:03 PM   #13
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I just read it wrong then. carry on :P
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Unread 02-06-2014, 01:39 PM   #14
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I don't want to cause someone issues, so I'm going to edit my post here. After installing my lift with 3/8" thick shackles, I found that these lengths worked, but it would have been better if both sizes had been 1/4" longer. Usually you can't find these in 1/4" increments, so that means they should be 1/2" longer. You could cut 1/4" off if you wanted. I wouldn't.

I used the lengths posted above, and it worked, but I had to omit washers on both sides of the frame mounts, and I had to omit the washer on the head side of the shackle bolts.

Next time I would go with this:
Frame spring mounts are 9/16-12NC and need 4.50" length.

Upper and lower shackle bolts are 1/2-20NF and need 5.00" length. That length will work with 3/8" thick shackles and SAE washers on both sides of each bolt.


Quote:
Originally Posted by bpounds View Post
I crawled around under Mauser and confirmed the bolts I will need.

Frame spring mounts are 9/16-12NC and need 4" length.

Upper and lower shackle bolts are 1/2-20NF and need 4.5" length. That length will work with 3/8" thick shackles.

Ordered all that including washers and nylock nuts from McMaster. All grade 8.
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1988 Wrangler,4.2L I-6, Howell EFI JP-1, 5 Speed Peugeot, Zone 2.5" lift + 1/2" booms, BFG 31 x 10.5, Bestop.
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Unread 02-06-2014, 04:50 PM   #15
kingcat400
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my frame side bolts were metric on my 93. 16mm i think
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