A U-bolt is a bolt in the shape of the letter U with screw threads on both ends. Carbon steel U bolt clearly means the material of the U bolt is carbon steel.
The U bolts are made of hot-dip galvanized steel. U Type Bolt used as connecting fittings for suspension set, it depends on bolts connection method to fix with cross arm of pole and tower, and simplify the cross arm construction.
U type bolt only applicable for using on earthing wire and small section area conductors.