Afastening according to the invention com-prises the combination of a spring-loadedpress button, abell-crank leverone arrn ofwhich seyves as a catch piece which is adaptedto extend from the frss edge of the door forengagement with akeeper,and a link interoon-necting the ocher arm of the bell-crank leverwith the inner end of the press-button,thearrangement being such that in the unlatchedposition of the fastening said otherarm of thebell-crank lever forms with the link an exten-ded toggle linkage,which requires to be brokenby movement of the catch piece before thefastening can moye to the latched position,whilst in the latched position of the fasceningsaid other arm of the bell-crank lever externdsparallei to the putton and the link extendssubstantially at right angies thereto,so thatthe fastening is heid in thelatched positionuntil the push button is actuated.