lag screw

¹

noun

1. a heavy wood screw having a square or hexagonal head driven by a wrench.

lag-screw

²

[ lag-skroo ]

verb (used with object)

1. to fasten with a lag screw.

lag screw

noun

1. a woodscrew with a square head

Word History and Origins

Origin of lag screw¹

First recorded in 1870–75

Word History and Origins

Origin of lag screw¹

from lag ³; the screw was originally used to fasten barrel staves

Example Sentences

All of the rails should be tenoned into the posts thoroughly, even if the lag screw fastenings are used.

From Project Gutenberg