grepspud 1Set Trailer U Bolt Kit for 3500 lbs 2-3/8" Round Axle, 6-1/4" Long, 1/2” Diameter, Trailer Axle U Bolts Leaf Spring U-Bolt Kits for 3,500lbs Spindle 2pcs Plates + 4pcs U-bolts is up for auction in Automotive. The current bid is $2.50, 90% below the $23.99 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.