April 17, 2015 Online Store No Comments +3 U Bolt Eliminator Base Plate 15712 C$15.00 In stock Quantity: 1 Add to Bag Product Details Brand: Welder Series MPN: 15712 Thickness: 3/8" Hole size: Outside holes 3/8", center hole 9/16" Clamp plate base for u-bolt eliminator kit WS15710. Center hole is 9/16''. The 2 outer holes are 3/8''. 3/8'' steel. 3-1/2" x 4-3/8". Save this product for later Favorite