Schlage M400 Series Installation Instructions Manual page 5

4
Attach armature to door.
4a Install armature holder.
4b Install armature plate as shown for door type (M420/M450 shown).
Wood Door
Sex Nut
Z\x" hole
through
Armature bolt must be
tightened to 120 in-lbs.
5
2x
Reinforced Metal Door
Armature
Bolt*
Drill and
tap for
B\zn - 18
machine
screw
Correct
Hollow Metal Door
Sex Nut
Armature
Bolt*
ZZ\cx"
hole
Z\x" hole
Incorrect
Armature holder screws
must be flush to inside
of armature holder.
Armature
Bolt*