New trailer U bolt kit for 5200-7000lbs 3" Round Axle 7" long 1/2" dia -20080 This kit is for 5,200lbs-7,000lbs round axle which axle beam dia 3" . . 4 x 7" long U bolts, U bolts dia. 1/2" 2 x tie plates for 1-3/4" or 2" leaf springs 8 x 1/2"-20 hex nuts