NL drive screw part number

RELATED FAQS

Question
Answer
The part number for 98/99 series NL Drive Screw is 970441-89. The NL Drive Screw is also available in package of ten, part number 090074-00 NL Drive Screw can't be substitute with a standard sc...
The Von Duprin 7500 mortise lock body ships in the NL mode.  Either the function of 7500 lock body has not been changed to the Classroom function or the NL Drive screw is not all the way down. Step...
  Tips for changing the function: The NL Drive screw will not be visible when lock body is set to Classroom function There is locktite on the screw that makes it seem like its turned down enou...
Von Duprin 98/99 NL drive screw is located in back of the 98/99 center case assembly. NL drive screw should be left in with trim lock slide plate in up position in the 98/99 exit device with E99...
You must use the drive bushing that is supplied with the 179L control trim.  It is different from teh 1790 bushing.
Step 3 and 4 of 179L Instructions will show the old drive bushing being removed & the new drive bushing getting installed
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...