Jump To:

• lag screw
  lag screw

  noun

  a heavy wood screw having a square or hexagonal head driven by a wrench.
• lag-screw
  lag-screw

  verb (used with object)

  to fasten with a lag screw.

lag screw

¹ American  

noun

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

---

lag-screw ² American  

[lag-skroo] / ˈlægˌskru /

verb (used with object)

1. to fasten with a lag screw.

---

lag screw British  

noun

1. a woodscrew with a square head

---

Etymology

Origin of lag screw

First recorded in 1870–75

Example Sentences

Use a 3/8 by 3-in. lag screw, boring the hole in the tenon with a 1/4-in. bit the full depth the screw is to enter.

From Mission Furniture How to Make It, Part 2 by Windsor, H. H. (Henry Haven)

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

From Mission Furniture How to Make It, Part 2 by Windsor, H. H. (Henry Haven)