1/2" x 3" x 7" Round u-bolt 1/2"-20(Rod diameter - threads per inch) 3" wide from inside to inside 7" long Nuts included Qty. 2 u-bolts, 4 nuts » Spring seats required for mounting axle to leaf spring sold separately. Typically fits a 5,200-lb to 7000-lb axle with a 1-3/4" or 2" spring width. L=7" A=3" D=1/2"