Abstract: A clevis assembly having a folding clevis for supporting an air launched missile has an attached pivot pin having a non-round cross section which rotates in a elongated hole in the sides of the clevis block in which the clevis lies in its stowed position. When the clevis is extended in position to engage the hooks on the missle ejector, the pivot pin is raised in the elongated hole to its upper position in which the non-round profile of the pin fits into the non-round profile of the elongated hole in the side of the recess in which it is mounted so that the pin cannot rotate. This provides a longitudinal restraint of the missile on the ejector because the clevis is prevented from rotation.