American Fence & Supply Co.: 1-3/8" PANEL CLAMP for temp.const.panel
allFENZ 1-3/8 in. Galvanized Metal Panel Clamp with Nuts and Bolts (Sets of 4) KC138-4 - The Home Depot
Amazon.com : HITTITE 8 Set Dog Kennel Panel Clamps, Chain Link Fence Panel Clamps for Round Pipe Panel Frame with 1-3/8"/32mm Diameter, Saddle Clamps for Dog Kennels & Chain Link Fence. :