... F288 covers three types of drawn pure and thoriated tungsten wire suitable for fabrication into parts for electron tubes, lamps, ... such as tensile strength, ductility, and surface defects. The weight/diameter conversion formulas are given. Wires shall be furnished in the ... a clean finish, free of graphite, grease, oil, and lubricants. Wire for hooks, supports, springs, anchors, and mesh shall have a ...