Anina 4PCS Square U Bolts with Frame Plates and Nuts Stainless Steel U Clamp Bolts for Wood, Sailboat Trailers, Tube, Industrial Supplies 3/8'' x 4'' x 7'' Thread is up for auction in Industrial & Scientific. The current bid is $2.50, 89% below the $23.00 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.