Abstract: A buckle for fastening together the ends of a flat plastic strap, comprising in a unibody construction a pair of parallel ends a pair of parallel side legs disposed between the parallel ends, and a pair of parallel intermediate legs disposed between the parallel side legs with the intermediate legs having a rough top surface and a rough bottom surface, and the side legs have rough bottom surfaces, and constructed in such a manner that one end of the strap is threaded between the two intermediate legs, over the top surface of one intermediate leg and one side leg and under the bottom surface of one side. leg, with the other end of the strap being similarly threaded on the other intermediate leg, whereby the buckle holds tightly the strap after the ends are pulled tightly with the rough surfaces holding the strap and the strap being threaded so as to have four 90.degree. bends at the leg corners to enable better holding by the buckle of the strap in the tightened position.