This kit has everything you need to mount your trailer's leaf springs to a 2-3/8" round axle. • (4) 5-1/2" Long U-bolts   • (2) U-Bolt plates for 1-3/4" leaf springs    • (8) 1/2-20 Hex nuts    L=5-1/2"   A=2-3/8"   D=1/2" Typically fits a 3,500lb axle.  Spring width: 1-3/4" 

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