Question:
What is the nut size for these u-bolts?
asked by: Hjalmar E
Expert Reply:
Replacement U-Bolt # 175668 includes nuts with a 9/16-inch inside diameter and which require a 7/8-inch wrench. This part fits on 2-1/2-inch diameter round trailer axles.
Replacement U-Bolt w/Nuts for 7,500-lb, Round Trailer Axles - 9/16" Diameter
