MA Series Specification

9
Catalog
Number
ANSI
Function
Outside/Inside
Name Description
MA441 F 32 Classroom Security Lock
Latch bolt operated by knob/lever from either side except when outside
knob/lever is locked from inside or outside by key. When outside knob/
lever is locked, latch bolt is retracted by key from inside or outside or by
operating inside knob/lever. Auxiliary dead latch.
MA451 F 15 Hotel Guest Lock
Latch bolt operated by key from outside or by operating inside knob/
lever. Outside knob/lever is always inoperative. Dead bolt projected
by turn from inside and all keys except emergency key are shut out.
Operating inside knob/lever retracts both bolts. Auxiliary dead latch.
MA521 F 04 Entry / Office Lock
Latch bolt operated by knob/lever from either side except when outside
knob/lever is made inoperative by buttons in face. When outside
knob/lever is locked, latch bolt is retracted by key from outside or by
operating inside knob/lever. Auxiliary dead latch. Outside knob/lever is
unlocked by button on face.
MA531
F 12 /
F 20
Apartment Corridor
Door Lock
Latch bolt operated by knob/lever from either side, except when
outside knob/lever is made inoperative by buttons in face. Dead bolt
operated by key outside or turn inside. Key outside operates both bolts.
Operating inside knob/lever retracts both bolts and outside remains
locked. Latch bolt is deadlocked when outside knob/lever is made
inoperative or when the dead bolt is projected. When dead bolt is
retracted, knob/lever is unlocked by buttons in face.
MA541 F 21 Room Door Lock
Latch bolt operated by knob/lever from either side. Dead bolt operated
by key from outside or turn from inside.
MA551 F 06 Holdback Lock
Latch bolt operated by lever from either side except when outside lever
is locked from outside by key. Latch bolt can be locked in a retracted
position by key. When outside lever is locked, latch bolt is retracted
by key from outside or by operating inside lever unless latch bolt has
been locked in a retracted position. Auxiliary dead latch. Note: Chassis
is handed. To activate the Holdback Function – from the unlocked
position rotate the outside lever/knob to retract the latchbolt. Rotate
key 360 degrees. Release lever/knob. To release Holdback Function,
rotate key 360 degrees clockwise.
MA561 F 05 Classroom Lock
Latch bolt operated by knob/lever from either side except when outside
knob/lever is locked from outside by key. When outside knob/lever
is locked, latch bolt is retracted by key from outside, or by operating
inside knob/lever. Auxiliary dead latch deadlocks latchbolt when door is
closed. Inside knob/lever always free for immediate exit.
MA571 F 13 Dormitory or Exit Lock
Latch bolt operated by knob/lever from either side. Dead bolt projected
by key from outside and turn from inside. Operating inside knob/lever
retracts both bolts and unlocks outside.
MA581 F 07 StoreroomLock
Latch bolt operated by key from outside or by operating inside knob/
lever. Outside knob/lever is always inoperative. Auxiliary dead latch.
Indicates interchangeable core available.