Locksmith New Jersey Dictionary Letter J's Page

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-J-

jackscrew
n. a threaded rod used for centering and balancing a vault door & frame in position during installation
 
jamb
n. the vertical components of a door frame
 
jiggered finish
n. a surface adorned with overlapping concentric circles
 
jimmy proof
adj. pertaining to a lock having a bolt which interlocks with its strike
 
JIS
abb. Japanese Industrial Standard
 
jumbo cylinder
n. a rim or mortise cylinder of 1-1/2" diameter

This listing of the glossary is courtesy of

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