Wordnet 3.0
NOUN (1)
1.
a bolt with a square or hexagonal head on one end and a threaded shaft on the other end;
tightened with a wrench;
used to connect metal parts;
The Collaborative International Dictionary of English v.0.48:
machine bolt \machine bolt\ n.
A threaded hexagonal or square-headed bolt with a nut; it is
tightened with a wrench and used to connect metal parts.
[WordNet 1.5]
WordNet (r) 3.0 (2006):
machine bolt
n 1: a bolt with a square or hexagonal head on one end and a
threaded shaft on the other end; tightened with a wrench;
used to connect metal parts