Stanley-National Hardware 3/8-in x 3-in Zinc-plated Square U-bolt in the Specialty Bolts department at Lowes.com
Stainless Steel U-Bolt Clamp With Nuts & Washers - Troll King – Canyon Lake Products
Stainless Steel Saddle U-Bolt Muffler/Exhaust Clamp, 2.25 Inch - Walmart.com
Amazon.com: 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 : Electronics
U Clamps | Alpha Series Electro Galvanized - UBS
U-Clamp / Steel U Bolt, Single - Realty Supply Center
Gibraltar - Square U-Bolt: Without Mount Plate, 3/8-16 UNC, 5-5/8″ Thread Length, Steel - 82686676 - MSC Industrial Supply
Empire - Round U-Bolt: Without Mount Plate, 1/2-13 UNC, 3″ Thread Length, for 5″ Pipe, Steel - 02163129 - MSC Industrial Supply
Stainless Steel U Bolt Clamps | Stainless Steel Pipe Buckle | U Bolt Clamp Steel Pipe - Bolts - Aliexpress
U-bolt clamp 50 - Radio/TV transmitter superstore
2 1/4" U Clamp - CL ZI U-BOLT
8" Clamp Guillotine Style with 3/8" Flat U Bolt Bare Steel