Encyclopedia

square bolt

square bolt

A door bolt which moves in a casing; similar to a barrel bolt but has a square rather than a circular cross section.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive
In the Model 500 the lifter is skeletonized and lies invisibly on both sides of the square bolt when the action is closed.
All we had was a socket wrench with a 24-inch handle and an end wrench that fit square bolt heads.
What you see in both the centerfire and rimfire versions is a square bolt, reciprocating back-and-forth in a trough formed by the sheet metal receiver.
In response to the letter about square bolts and nuts, Fastenal Co.
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