This kit has everything you need to mount your trailer's leaf springs to a 3" round axle. • (4) 7" Long U-bolts   • (2) U-Bolt plates for 1-3/4" or 2" leaf springs   • (8) 9/16"-18 Hex nuts (916N) 

Typically fits a 5,200lb to 7,000lb axle.                      Spring width: 1-3/4" or 2" L=7"   A=3"   D=9/16"

» Spring seats on axle required for mounting axle to leaf spring sold separately.