a threaded fastener, used with a nut for connecting metal parts, having a thread diameter of about 1 / 4 in. (6.4 mm) or more and a square or hexagonal head for tightening by a wrench. Cf. cap screw, machine screw, stove bolt . See illus. under bolt 1 .
MACHINE BOLT
Meaning of MACHINE BOLT in English
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012