Specification Sheet

The 4550 MS
®
Deadlock Lever easily unlocks an MS
®
Deadlock with approximately three pounds of downward
force. The spring-loaded lever relocks with an upward motion.
4550 MS
®
Deadlock Lever
Function
Easy unlocking of any MS Deadlock by approximately 3lbs. downward force on a
3" lever. Lever is spring loaded to horizontal, relocks with upward motion. Indicator
signals lock status. Can be installed in place of existing key cylinder or cylinder
type thumbturn on inside of door. 4550 Deadlock Lever not compatible with 7/8"
backset locks.
Operation
Turn lever downward 90° to unlock. When released, lever
returns to horizontal. Turn lever upward 90° to relock. Key
operation from outside is not affected. Clutching action
prevents damage to internal components.
Specifications
HOUSING
• Aluminum casting is 1-3/8" wide x 7-1/2" long x 1" deep.
LEVER
• 3" long aluminum with end-return design offers comfortable
grip to lock or unlock.
INDICATOR
• Words “LOCKED" in red letters or “OPEN" in black letters
appear on white background when lock is thrown or
retracted. Indicator is driven by lock bolt itself.
STOP CLEARANCE
• Lever housing projects 11/16" forward of cylinder backset
centerline. Depending on height of door stop and width
of door/jamb gap, it may be necessary to modify the
stop to clear the housing. For fin type stops, this is easily
accomplished. Hollow stops may preclude use of lever.
COMPATIBLE LOCKS
• Any MS
®
pivoted bolt deadlock including “Schoolhouse”
versions can be fitted with the 4550 including MS1850S,
MS1950, MS1837, etc. Derivative units such as 1870,
1870HM, or 1877 flushbolts (bolt into threshold) are also
operable by the 4550 lever. Not compatible with MS+1890 or
2190 Deadlock/Latch or with 7/8" backset locks.
OPTIONS
• Available in three finishes to match anodized aluminum
finishes. Can be ordered for left or right hand door, but is easily
reconfigured in the field to accommodate either door swing.
STANDARD PACKAGE
• Individually boxed with installation instructions, mounting
screws, and drive pins for both single point and threshold
bolt-equipped locks. Shipping weight: 1 lb.
4550 MS
®
DEADLOCK LEVER
800.872.3267 • Fax [phone]
10027 S. 51st Street, Ste 102
Phoenix, Arizona 85044
www.adamsrite.com
ARM-014-9/14
TRIM
T-11