1/2" x 1-1/2" x 5" Square u-bolts with nuts • 1/2"-20 (Rod diameter - threads per inch) • 1-1/2" wide from inside to inside • 5" long • Nuts included • Includes 2 u-bolts, 4 nuts For 3,500-lb axles only L=5"   A=1-1/2"   D=1/2"