Prime-Line 9071969 U-Bolts, Round Bend, 5/16 In.-18 X 1-3/8 In. X 2-1/2, 10 Pack Product Details 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. 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 Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.