Square U-Bolt 1.Material: Stainless Steel, Carbon Steel 45# and ... certified with TS16949 and ISO9001/2000 quality control system.U bolt clamps1)Certification:ISO2)Grade: 4.8-12.93)Dia: ... thread7)Material:mild steel,1035steel,1045steel,5140steel,40Cr, C45 8)Shape:round,round flat,half-round ,half-round flat. square ... : trucks, trailers as well as other cars U-Bolt Wheel Bolt U-Clamps for truck trailer