barrel bolt


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barrel bolt

[′bar·əl ‚bōlt]
(design engineering)
A door bolt which moves in a cylindrical casing; not driven by a key. Also known as tower bolt.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

barrel bolt, tower bolt

A door bolt which moves in a cylindrical casing; not driven by a key.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
"Barrel bolt locks haven't changed in almost 100 years, and annoying door shift and lock misalignment issues have gone unresolved, until now," he said.
Dovetail the barrel for the 10-32 barrel bolts according the pattern for your forend.
Barrel bolts are a sliding luck mechanism to provide security for average weight doors.
8 eight-foot-long 4-by-4 fence posts 5 ten-foot-long 2-by-6s 3 ten-foot-long 2-by-4s 2 twelve-foot-long 2-by-6s 4 eight-foot-long 2-by-4s 3 six-foot-long 1-by-4s 1 four-foot 2-by-2 1 gallon of solid-color acrylic latex wood stain 200 3-inch deck screws 50 1 1/2-inch deck screws 25 feet of 36-inch-wide, 1/2-inch-square galvanized wire mesh (fence cloth) 1 pound of fence staples 6 three-inch galvanized butt hinges with two screw holes 3 fence handles 6 fence barrel bolts
One sheet of 4' x 8' x 1/4" plywood Five 2" x 4" x 8' lengths of fir One length of 1" x 2" x 6' fir stock (stakes) One length of 1" x 4" x 8' fir stock (stakes pockets) Two 90-degree galvanized angle brackets Forty-five 1/4" x 3" galvanized lag bolts Forty-five 1/4" galvanized washers Four 1/4" x 3" galvanized bolts with washers and nuts One tube of waterproff carpenter's glue 1 lb #8 x 1 1/4" drywall screws 1 gallon of primer 1 gallon of paint 1 wheel Two 3" barrel bolts
The panels meet at a removable center post, which has a gate handle and four catches for barrel bolts attached to the openable fence rails.
Photo: When not in use, removable sections fit under the lip of the fixed railing; they're secured to posts with barrel bolts.