BLITZ FLUSH BOLT (TOP) FB41B FLUSH BOLT (BOTTOM] 1 BEEF INSTALLATION INSTRUCTIONS: MORTISE INACTIVE DOOR FOR BABBITT (TOF) AND FB41B (BOTTOM) FLUSH BOLTS. FBS1T AND FEB FIT DOOR AND FRAME PREPARATION. HANG INACTIVE DOOR. WITH DOOR OPEN, MEASURE MINIMUM DISTANCE (MIN CLEARANCE) FROM DOOR TO FINISHED FLOOR. REMOVE DOOR. INSTALL OFFBEAT TOP FLUSH BOLT IN EDGE OF DOOR. ADJUST TOP BOLT SO IT IS FLUSH WITH TOP OF DOOR WHEN RETRACTED AND BEVEL IS TOWARDS THE PUSH SIDE OF DOOR.