A metallic headed fastener having internal threads for a portion of the full length. It may have a smooth, hexagon or splined shank with an open or closed end. Is designed to be expanded tightly against the material it is being installed in by means of a special tool. The item must have a specified grip range. The grip range is the thickness of the material the item is being installed in. See also NUT (1) SELF-LOCKING, BLIND RIVET. Excludes NUT (1), SLEEVE.