To convert the Von Duprin 98/99 Rim or Vertical (Rod or Cable) Exit Device with functional lever (996L-R/V) to act like a rigid lever (996L-NL-R/V) with key over ride follow these steps:
R...
MA531 (ANSI F20) Apartment Corridor Door Lock
Latch bolt operated by knob/lever from either side, except when outside knob/lever is made inoperative by buttons in face. Dead bolt operated b...
Changes to the Falcon W501 latch offering were made on 2/13/2012.
Prior to 2/13/2012: The W501 entry lock was supplied with a restoring latch which causes the button to pop and unlock...