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GLOSSARY

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Jackscrew

(n.) A threaded rod used for centering and balancing a vault door & frame in position during installation.

Source: Lock Industry Standards and Training (LIST) Council

Jamb, Jambe

(n.) 1. One of a pair of vertical posts or pieces that together form the sides of a door, window frame, or fireplace, for example.
(n.) 2. A projecting mass or columnar part.

Source: Dictionary.com

Jiggered Finish

(n.) A surface adorned with overlapping concentric circles.

Source: Lock Industry Standards and Training (LIST) Council

Jimmy Proof

(adj.) Pertaining to a lock having a bolt which interlocks with its strike.

Source: Lock Industry Standards and Training (LIST) Council

JIS

(abb.) Japanese Industrial Standard

Source: Lock Industry Standards and Training (LIST) Council

Jumbo Cylinder

(n.) A rim or mortise cylinder of 1-1/2" diameter.

Source: Lock Industry Standards and Training (LIST) Council
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