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

They’ve also replaced large lag screws — because why hand crank something for 10 minutes, when your power tool can do the work in 10 seconds?

From Seattle Times

Holes are provided in the Press for mounting by lag screws or bolts.

From Project Gutenberg

The girder molds were 1½-in. stuff, and to the side pieces were nailed 1×4-in. cleats; the bottom and side pieces were connected by ⅜×4-in. lag screws spaced 28 ins. apart.

From Project Gutenberg

In the chair shown, the joints are reinforced by the addition of lag screws.

From Project Gutenberg

Have the two end rails exactly the same length and proceed to fasten the front and back posts to them, using 4-in. lag screws and washers.

From Project Gutenberg