Jack screw from an Apollo Command Module tool set, measuring approximately 4″ x 2.5″ x 1″, stenciled with difficult to decipher part numbers. In fine condition. The Apollo tool set included several wrenches, screwdrivers, and handles. Three jack screws were included in the set, and available for use as backup latches in the event that the installed hatch latches became inoperable or the hatch was deformed.