U-Bolts are used to connect and secure the trailer axle to the leaf spring. They are designed to fit around the axle, with the threaded ends inserted the the holes of a tie plate that is placed below the leaf springs.
Sold each. Nuts and Washers are NOT included. (sku #CS10811 and CS10961)
Specifications:
Measuring U-Bolts:

C. E. Smith Company, Inc. manufactures and sells replacement parts for small to mid-size boat trailers including trailer fenders, boat guides, galvanized bracketry, tire carriers, replacement wheel bearings, rubber rollers, roller shafts, u-bolts and other requirements for boat trailers.
