Abstract: Overlapping ends of metal strap, or the like, are aligned and connected without the aid of an overlying supplemental seal or fastener by means of an array of longitudinally spaced joints which form a one-way interlocking relationship. The joints comprise juxtaposed protuberances formed by slits in the strap ends, integral with the overlapping strap segments, which override each other as the interlocking relationship is formed. Protuberances at each end of the array on one of the strap ends are angled laterally in opposite directions and have a greater width than that of the remaining protuberances which, upon shifting of the joined overlapping lengths of metal strap relative to each other in a direction tending to disengage the joints, wedge in the corresponding slits of the other strap to provide a stop preventing disengagement.