This kit has everything you need to mount your trailer's leaf springs to a 3-1/2" round axle. • (4) 8" Long U-bolts   • (2) U-Bolt plates for 2" leaf springs   • (8) 9/16"-18 Hex nuts (916N)  Typically fits a 8,000lb axle.  Spring width: 2" L=8"   A=3-1/2"   D=9/16"

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