machine screw

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A screw with a thread along the entire length of the shaft.

Century Dictionary and Cyclopedia

1. n. A bolt or screw having a moderately fine machine or standard bolt-thread, a blunt end, and a fillister, flat, or button head to be set home by a screw-driver rather than a, wrench: used for holding together parts of machines or other metal-work.

Wiktionary

1. n. A screw designed for metal or a similar material, usually with no point and a relatively fine thread, intended for prepared, threaded holes.

GNU Webster's 1913

1. n. a screw or bolt adapted for screwing into metal, in distinction from one which is designed especially to be screwed into wood.
2. n. A type of screw used either with a nut or with a tapped hole; it has a slotted head which can be driven by a screwdriver.

WordNet 3.0

1. n. a screw used either with a nut or with a tapped hole; slotted head can be driven by a screwdriver