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Sargent 8255 LNL Office Function Mortise Lockset - LA Keyway
The Sargent 8255 LNL is a premium Grade 1 Heavy-Duty Mortise Lockset designed to provide flexible security for professional office environments, administrative suites, and commercial buildings. As a flagship model in the Sargent 8200 Series, it is engineered to withstand extreme physical abuse while offering the legendary reliability of a heavy-gauge steel mortise chassis. The 8255 Office Function (ANSI F04) allows for versatile access control, enabling the door to be locked or unlocked via the stop works (toggle) on the lock face or by the exterior key.
Versatile Office & Entrance Function (ANSI F04)
The 8255 function is the industry standard for private offices where users need to toggle between "open" and "restricted" access throughout the business day.
- Dual Locking Control: The outside lever is made rigid (locked) or operative (unlocked) by the stop works (toggle) located on the front of the lock body.
- Keyed Entry: When the outside lever is locked, entry is gained only via a physical key using the standard LA Keyway.
- Constant Free Egress: Regardless of the locking status, the inside lever always allows for immediate exit, ensuring full compliance with NFPA 101 Life Safety Codes.
Architectural Excellence: The LNL Trim Design
The LNL design combines the contemporary L-Lever with the traditional LN-Rose, providing a sleek, professional aesthetic that complements modern office interiors.
- ADA Compliance: The linear L-Lever is ergonomically shaped for easy operation without tight grasping, meeting all ADA accessibility requirements.
- Lever Sag Prevention: Equipped with high-carbon steel spring cartridges that ensure the levers remain perfectly level and horizontal, maintaining a professional look for the life of the building.
- LA Keyway Standard: This lockset comes with a 6-pin brass cylinder in the popular Sargent LA Keyway, making it easy to integrate into existing master key systems.
Key Product Features
- ANSI/BHMA Grade 1 Certified: The highest industry rating for mechanical strength, cycle life, and security.
- Office/Entrance Function (F04): Features a face-mounted toggle for easy locking management.
- Fire Rated: UL/cUL Listed for use on 3-hour fire-rated doors, essential for corridor and office safety.
- High-Security Latching: Features a 3/4" throw stainless steel anti-friction latchbolt for smooth operation and increased resistance to forced entry.
- Field Reversible: The non-handed chassis is easily adjusted in the field to accommodate any door handing.
- Vandal Resistant: Built on a 12-gauge heavy-duty wrought steel lock case that is zinc dichromate plated for maximum corrosion resistance.
Technical Specifications
| Feature | Details |
| Function | 55 Office / Entrance (ANSI F04) |
| Series | 8200 Heavy-Duty Mortise |
| Lever Style | LNL (L-Lever with LN-Rose) |
| Cylinder | 6-Pin Brass, LA Keyway |
| Backset | 2-3/4" (Standard for Mortise Locks) |
| Latchbolt | 3/4" Throw Stainless Steel Anti-Friction |
| Case Material | 12-Gauge Heavy-Duty Wrought Steel |
| Warranty | 10-Year Mechanical Limited Warranty |
Ordering & Installation Information
The Sargent 8255 LNL is designed for precision fitment in standard commercial door preparations. While the lock is field reversible, providing the hand of your door ensures the unit arrives ready for immediate mounting.
| Finish with BHMA code | 626 - US26D Satin Chrome or 630 - US32D Satin Stainless or 613E - US10BE Oil Rubbed Bronze Equal or 605 - US3 Polish Brass or 612 - US10 Satin Bronze or 625 - US26 Polish Chrome |
| Sargent Keyways | LC - Less Cylinder or LA Keyway or 60 - LFIC less Core or 70 - SFIC less Core |
| Brand | Sargent |
| ANSI Mortise Lock Function | F04 - Office Entry |
| Trim Design | LNL |
| Series | Sargent - 8200 Series |
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