3/8" x 2-1/2" x 4", #642 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.