Leaf spring U Bolt commonly used on Ifor Williams Trailers52mm inside width85mm inside length (150mm overall)50mm thread lengthM12 Thread4 U bolts req..
Knott Pressed Steel Unbraked Coupling Head (Hitch) to suit 50mm BoxMaximum towing weight 750kg2 fixing holes in the top to suit M12 bolts at 90mm cent..