• 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.
• COMPATIBLE LOCK
• 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.
• MS Deadlock Lever
• Easily Unlocks and MS Deadlock with Three Pounds of Downward Force
• Spring-Loaded Lever Locks and Reloads with Upward Motion
• Indicator Signals Lock Status
• Warranted Free From Defects In Workmanship And Materials Under Normal Use And Service

Features

• Derivative units such as 1870, 1870HM, or 1877 flush bolts (bolt into threshold) are also operable by the 4550 lever.
• 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.
• Lever: 3" long aluminum with end-return design offers comfortable grip to lock or unlock.
• Any MS® pivoted bolt deadlock including "Schoolhouse" versions can be fitted with the 4550 including MS1850S, MS1950, MS1837, etc.
• Not compatible with MS+1890 or 2190 Deadlock/Latch or with 7/8" backset locks.
• 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.
• Compatible Lock:
• Housing: Aluminum casting is 1-3/8" wide x 7-1/2" long x 1" deep.
• 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.
• 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.

Resources

• 2019 Adams Rite Price Book
• 2019-2020 Adams Rite Price Book
• 2020-2021 Adams Rite Catalog
• 4550 MS Deadlock Lever Installation Instructions
• 4550 MS Deadlock Lever Installation Instructions
• 4550 MS Deadlock Lever Installation Instructions
• Cut Sheet
• Cut Sheet