Project Description

© – A – B – C – D – E – F – G – H – I – J – K – L – M – N – O – P – Q – R – S – T – U – V – W – X – Y – Z – Appendix

-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

© – A – B – C – D – E – F – G – H – I – J – K – L – M – N – O – P – Q – R – S – T – U – V – W – X – Y – Z – Appendix