ND thick door

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The keycam may have failed, example here, the latest design keycam can be easily identified as the colored changed to black. Replace either the keycam or chassis as needed to r...
 This could also happen if the tailpiece isn't installed in a KIL, FSIC, or SFIC cylinder.  The FSIC driver also could have come loose from the core in the spindle.
Schlage ND-Series tailpieces for extended doors are available by only two means, but are not available to order separately. If an extended tailpiece is needed, then a complete lock will need to ...
As of February 2016, ND locks began shipping with a new latchbolt. The new latchbolt offers substantially improved performance in adverse door conditions (ex, with heavy door loading) andis more ro...
Prior to February 2016, using ND-Series locks on hollow metal doors required the use of latch spacers which prevent the latch from "fishtailing" (back end of latch moving from side to side). Latch ...
There is potential for ND40/ND44's manufactured around March 2011 to remain locked after egress, or after the latch is depressed.  There was an issue with the keycam that created a bind when l...
The 6211 would be the most common electric strike to be used with cylindrical locks on a single door application.  Check the template to confirm compatibility with specific cylindrical lock model n...
ND locks can be extended up to 6" Extended Outside.  
The standard out-of-the-box ND lock will fit the following door ranges: All functions except ND85 will fit onto a door 1 5/8" through 2 1/8" extended equally. The ND85 will fit on doors fro...
The ND lock can be installed on a 1 3/8" thick door by utilizing spacers, part number XN12-012.  These spacers are included with the lock when ordered for a 1 3/8" thick door.  The spacers can be o...
Both the ND50 and ND53 will not unlock when the door is shut.  The only way to pop the button is by turning the key on the outside or the lever on the inside.  Occasionally custome...
Thermal Bow is a temporary condition which occurs in metal doors mainly due to the temperature differential from one side of the door to the other. This may occur in exterior doors when direct sun ...
The U-Factor, R-Value and K-Thermal Rating are measurements of thermal transmission through building products. U-Factor: Overall co-efficient of heat transmission passage through a built-up panel...