64mm Square Top U-Bolt measuring 153mm long from inside the U section and 65mm between the legs with 50mm thread length, made from 12.9mm (1/2") rod with a rolled whitworth thread.
Remember, Nyloc Nuts and Washers need to be ordered separately
A: 153mm (6")
C: 12.9mm (1/2")
D: 50mm (2")