I've bought two sets of u-bolts on eBay now and neither one have been good. The most recent set I got, the top of the u-bolt isn't even square, so it won't sit properly on the top of the leaf spring. It will only touch at the corners of the springs and probably wear them down or damage them. In the pictures below, the eBay u-bolt is on the left, and a GM u-bolt is on the right. I need ones that are slightly longer than the GM bolt, around 9.5" in length. But longer than this isn't an issue as long as there are sufficient threads.

So, where can I buy u-bolts that are long enough and are flat on the top? Any GM bolts long enough? Other sources? Thanks!

 

Maybe the z71 u bolts would be the correct length

 

I got grade 8 u bolts when I put on my caltracs from autozone. They were for a block style lift kit and were way over length. I had to cut them down after they were installed.

 

You're probably right! Anyone have the part numbers?

I just found some Husky ones on Rock Auto, here's a direct link: U-bolts

 

Oriellys autozone napa or a machine shop

 

Yes, I need these for my trac bars also. How long were the ones you got? I didn't see any there when I looked. Their site has some but the lengths range from 18-20"

 

this is where i bought mine

Suspension U bolts for leaf springs and custom applications

 

Pep Boys had the grade 8 ones for my truck. My stock bolts did not have enough threads after removing the 2" lift blocks.

 

It's been a few years but I'd say they were every bit of 18".

 

Thanks for the suggestions! I went ahead and ordered a set of 9.5" Husky brand ones from Rock Auto for $33 shipped, not too bad.