Prime-Line 9071969 U-Bolts, Round Bend, 5/16 In.-18 X 1-3/8 In. X 2-1/2, 10 Pack U-bolts feature machine threading on both arms and are designed to be inserted into two pre-drilled holes. They are primarily used to anchor cylindrical objects such as pipe, conduit, cable, tubing, round bar or rope. In some applications, U-bolts may be inserted into wet concrete with the threaded arms pointing up. Once the concrete sets around the "U" shaped end, the U-bolt will be firmly anchored into place and the protruding threaded tips can be used to attach objects to the concrete. Product Features Diameter-Thread Size: 5/16 inch-18 Inside Width/Compatible Pipe Diameter: 1 inch Used to secure pipe, conduit, cable or other cylindrical objects Requires pre-drilled holes (hole should be the same diameter as the threaded post) Includes U-bolt plate and 2 nuts Thread Type: Coarse, Thread Class: UNC-2A, Point Style: Blunt Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!