Specification Sheet

4920AN Heavy Duty
Deadlatch (ANSI Size)
Operation
Turn key or operate handle to retract spring-loaded Latchbolt. To
hold bolt retracted, push it in and secure by reverse turn of key.
Uses any standard mortise cylinder with MS
®
dimensioned cam.
Specifications
BOLT HOLDBACK
• While bolt is held fully retracted, a
reverse turn of the key retains the bolt,
allowing the door to be free swinging.
CYLINDER BACKSET
• 1-1/2" or 2-3/4" only.
CASE
• Measures 7/8" x 5-13/16" x depth. Depth varies
by backset (see table on back of page). Steel with
corrosion-resistant plating.
LATCHBOLT
• 5/8" x 1" x 5/8" throw. Solid brass. Handing is easily
reversible using only a screwdriver.
AUXILIARY LATCHPIN
• Stainless steel. Deadlocks latchbolt to prevent “loiding”
or case-knife entry.
FACEPLATE
• 1-1/4" x 8" armored flat faceplate can also be adjusted in
the field for right or left beveled edge doors.
STRIKES
• Stainless steel, US32D Satin finish (630). 4506-02 Strike
furnished to ANSI preparation specifications for flat jamb.
CYLINDER CAM
• 4920AN Heavy Duty Deadlatches are operable by any
standard 1-5/32" diameter mortise cylinder with MS
®
cam
dimensioned as shown. Cylinders with MS
®
cams can be
readily obtained from most cylinder manufacturers. See
CYLINDERS section for cylinder make, thumbturn and
trim ring information.
OPTIONS
• Backset, strike, and finish must be specified when ordering.
See 4900 Heavy Duty Deadlatch for aluminum stile door
applications.
STANDARD PACKAGE
• Individually boxed with faceplate, strike, and machine
screws for mounting. Order cylinders, paddles, handles
or lever operators separately. Shipping weight: 1-1/4 lbs.
4920AN HEAVY DUTY DEADLATCH (ANSI SIZE)
HOLLOW
METAL
WOOD
GRADE 1
E8231
4920AN Heavy Duty Deadlatch provides flexible traffic
control and easy installation for wood or hollow metal doors.
Function
For hollow metal or wood doors prepared for hardware according to the
specifications of the American National Standards Institute (ANSI), 4920AN
Heavy Duty Deadlatches provide precise traffic control. A key-controlled bolt
hold-back feature allows a door to free-swing part of the day and exit-only
when the bolt is free to latch. This allows a “locked” entrance to be used as an
exit by customers or visitors already in the building. Interchangeable, without
door modification, with any MS1850SN Deadlock of same faceplate shape
and backset. Replaces 4520 and 4720 ANSI Deadlatches. 1-3/4" minimum
door thickness required.
B
LOCK CASE
CAM
TR
A
DOOR CENTERLINE
*TOLERANCE: ± 1/16
DOOR STILE
TRIM RING
CYLINDER
TR* = A + .125 – B TR* = A + .132 – B
FOR MS
®
LOCKS: FOR 4500 SERIES LATCHES:
“Dim A”
R
R
1830
2190
2290
MS1837
MS1850S
MS1850SN
MS1861
MS1950
1875
MS
+
1890
4300
4510
4530
4900
4781
4920AN
8300
8400
8650
DEADLOCK
DEADLATCH
SERIES
SERIES
EXIT
DEVICES
1870
1870HM
1877
3080
3090
FLUSHBOLTS
TRIM
THIS CAM AVAILABLE FROM:
ADAMS RITE
ARROW
ASSA
BEST
CORBIN RUSSWIN
DORMA
FALCON
KABA-ILCO
MEDECO
SARGENT
SCHLAGE
WEISER
YALE
.120"
3.0mm
.182"
4.6mm
.334"
8.5mm
.620"
15.7mm
R
.721"
18.3mm
.950"
24.1mm
.334"
8.5mm
.800" ± .005"
20.3mm ± .127mm
.850" ± .005"
21.6mm ± .127mm
THIS CAM AVAILABLE
FROM ABOVE CYLINDER
MANUFACTURERS
ON SPECIAL ORDER
(OR MAKE FROM
STANDARD CAM)
THIS CAM AVAILABLE
FROM ALL CYLINDER
MANUFACTURERS
(STANDARD CAM)
Narrow stile doors require a trim ring to fill the gap remaining between the cylinder
shoulder and stile when a standard mortise cylinder is used. If the security of the
hardened steel Adams Rite MS4043 Cylinder Guard is not required, this ring may be
simply a length of 1.171 I.D. tubing. Its length varies depending on door thickness or
cylinder make and number of pins. The specific length required can be quickly
determined by the following formula:
DIMENSIONS OF CAM TO OPERATE:
DIMENSIONS OF CAM
TO OPERATE:
4070 SERIES DEADBOLT
DIMENSIONS OF CAM
TO OPERATE:
2331 DEADBOLT
CYLINDER TRIM RING FOR NARROW STILES
“ TR ” is trim ring length.
“
A ” is cylinder height (less shoulder but including cam).
“
B ” is one-half of door thickness.
4506-02
STRIKE
FURNISHED
FIELD REVERSIBLE
LATCHBOLT
800.872.3267 • Fax [phone]
10027 S. 51st Street, Ste 102
Phoenix, Arizona 85044
www.adamsrite.com
ARM-014-9/14
DEADLATCHES
DA-11