- 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
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