Adams Rite 4550 Maximum Security Deadbolt Lever

SKU: 4550
Weight: 2.50 LBS
Adams Rite


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Adams Rite 4550
Lever Operator for MS1850A or MS1850S
Sold Less Cylinder

Adams Rite 4550 Specifications

Housing: Aluminum casing is 1" wide x 7-1/2" long x 1" deep. Attached to door stile by four #10 screws
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 t he housing. (For fin type stops, this is easily accomplished). Hollow stops may preclude use of lever
Function: Easy unlocking of any MS deadbolt 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
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 on white background when lock is thrown or retracted. Indicator is driven by lock bolt itself
Compatible Deadbolts: Any MS pivoted bolt deadbolt including "Schoolhouse" versions can be fitted with the 4550: 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 latchlock or with 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