uxcell Round U-Bolt 1 Set 2.36"(60mm) Inner Width 110mm Length Steel M6 with Nut, Plate, Washer: Amazon.com: Industrial & Scientific
Amazon.com: U Bolt Kit for 5,200-7000 lbs. 3" Round Trailer Axle 7 1/8" Long 9/16" Diameter : Automotive
Amazon.com: U-Bolt 3-1/8' X 4" : Sports & Outdoors
MroMax U-Bolts M10x33 304 Stainless Steel M10 U-Bolt Fastener for 33mm Pipe Dia 2pcs: Amazon.com: Industrial & Scientific
Square U Bolt in Zinc 3/8'' x 3'' x 7'' U Bolt Zn, Industrial and Scientific Supplies U Bolts for Boat Trailer Tube, Rectangular Wood and Metal Objects (4 Pieces): Amazon.com: Industrial
U-Bolt Pipe Clamp U Bolt Assembly For Outdoor Antenna,secure an antenna mast (as well as pipes and ropes) of up to 1 5/8” diameter 2pcs - - Amazon .com