While the Rancho bolts are about 2X the price, I find they last and last. The threads don't seem to wear out and strip like so many other bolts I've run. I've been running my front Rancho u-bolts for nearly 5 years, probably removed/installed/retorqued 15 times at least and no signs of them wearing out. Likely running the 5/8" bolt helps as well, they are rated for up to 350 ft.lbs. torque, so only cranking them down to around 110 ft.lbs. they are hardly being being stresssed.gferris5 said:Here's a part number for some round rancho u-bolts I recently got in exchange for my arm (kinda expensive-a local spring shop will be able to give you cheaper ones-try Dentoni Spring works if you're in the Sacramento area): RS17493, they are 9/16x2.81x7.5 and will accomodate my 9 leaf rear pack + pinion shim.