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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.
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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.
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