Can the ALX170 single dummy spring cage be used as inside spring cage for double dummy trim?

The spring cage for the ALX170/ND170 (47268754) and the inside spring cage for the ALX172/ND172 (47268756) are the same except that the 47268756 adds a plate and two screws.  These parts are added to ensure the door maintains its fire rating in the event that the 2-1/8" crossbore is present.  

 

 


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