3/8" x 3" x 4-1/2", #652 Zinc, U-Bolt, With Plate & Hex Nuts, Designed For Hanging Or Fastening Products To Pipe, Wood, Etc, Bolts Are Suitable For Automotive, Plumbing & Other Home & Industrial Applications, Do Not Use For Overhead Lifting, Support Of Human Weight, Athletic Or Playground Equipment, When Safety Is Involved, Consult Manufacturer, Inspect Frequently, Bulk.