Although the outside blank plate (rose) may look the same between the ALX25 and ND25 some of the components used to build the lock are different. The blank plate (rose), mounting plate for the blank plate (rose), flat washer and screw are the same. The lock chassis, and spring cage are unique to the design of each lock series, and the mounting posts are unique to each lock do the the length (mounting post lengths listed below).
The ALX25 mounting post lengths are 1.44" (measured from under head), 10-32 UNF-2B thread.
The ND25 mounting posts lengths are 1.81" (measured from under head), 10-32 UNF-2B thread.
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