Sargent 82-4577 Inside Adapter & Plate Assembly for 8200 & 7800 Series Mortise Locks

The Sargent 82-4577 is a genuine OEM inside adapter and plate assembly — also referenced as a replacement plate — designed for Sargent 8200 Series and 7800 Series mortise locks. Compatible trim configurations include CO, CR, LN, O, TO, and TR lever and trim styles. As an authentic Sargent factory part, the 82-4577 ensures precise fit, finish alignment, and long-term mechanical reliability when restoring or servicing a Sargent mortise lock assembly.

Institutional Grade Features & Benefits

• Genuine OEM Part: Manufactured by Sargent to exact factory tolerances, ensuring drop-in compatibility with no modification required on 8200 and 7800 Series mortise lock bodies.
• Broad Trim Compatibility: Supports multiple Sargent trim designations — CO, CR, LN, O, TO, and TR — making this a versatile replacement plate for a wide range of installed mortise lock configurations.
• Restores Original Function: Replaces worn, damaged, or missing inside adapter and plate components to return the mortise lock to proper operating condition.
• Correct Fit, First Time: Using the genuine Sargent replacement part eliminates fitment guesswork and avoids the risk of incompatible aftermarket substitutes.
• Ideal for Maintenance & Facilities Teams: A go-to service part for institutional, commercial, and educational facilities that standardize on Sargent 8200 or 7800 Series mortise hardware.

Technical Specifications

• Model Number: 82-4577
• Part Type: Inside Adapter & Plate Assembly (Replacement Plate)
• Series Compatibility: Sargent 8200 Series, Sargent 7800 Series Mortise Locks
• Trim Compatibility: CO, CR, LN, O, TO, TR
• Product Class: Mortise Lock Replacement Part
• Brand: Sargent (Genuine OEM)

Technical Details