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Sargent 8225 LNL Dormitory Mortise Lockset – Commercial Grade
The Sargent 8225 LNL is a heavy-duty commercial mortise lockset configured for the Dormitory function — one of the most widely specified lockset functions in higher education, student housing, multi-family residential, and institutional facilities. Built on Sargent's proven 8200 Series mortise platform, the 8225 delivers the robust, full-mortise construction that commercial contractors, facility managers, and architects demand for high-traffic openings.
Dormitory Function — What It Means for Your Application
The Dormitory function (ANSI F82) operates as follows: the outside lever is always locked and can only be retracted by a valid key from the outside — ideal for resident privacy and security. The inside lever always allows free egress without a key, satisfying life-safety egress requirements. A turn/thumbturn on the inside can be used to lock or unlock the outside lever, giving occupants control over their own access. This function is the standard choice for dormitory rooms, residential suites, and similar occupancy doors where independent room security is required without relying on staff intervention for lockout.
Key Benefits
- Full mortise body construction — heavy-duty steel case provides superior durability and resistance to forced entry compared to cylindrical locksets
- Dormitory (F82) function — outside lever key-controlled; inside lever always free for egress; inside thumbturn for room lockout
- LNL lever trim — the LNL designation identifies the specific lever style; confirm trim finish compatibility with your hardware schedule
- LA Keyway cylinder — standard Sargent 40 Series mortise cylinder with LA keyway; compatible with Sargent master key systems and key control programs
- Commercial Grade performance — engineered for high-cycle, high-traffic institutional openings
- Master keying compatible — Sargent 40 Series cylinders support complex master key hierarchies suitable for campus-wide key control
Typical Applications
- University and college dormitory rooms
- Student housing and residence halls
- Multi-family residential and apartment buildings
- Healthcare patient rooms and behavioral health facilities
- Institutional and government housing
- Hotel and hospitality guestrooms (consult function selection)
Specification & Compatibility Notes
The Sargent 8200 Series mortise lockset is designed to fit standard ANSI/BHMA A156.13 mortise prep doors. When specifying, confirm door thickness, backset, and handing with your project hardware schedule. The LA keyway cylinder is a standard Sargent keyway; if your facility uses a different keyway or interchangeable core system, consult Sargent keying options or contact our technical team for guidance. The 8225 function number designates dormitory operation within the 8200 Series line.
Technical Details
| Feature | Details |
|---|---|
| Manufacturer | Sargent (ASSA ABLOY) |
| Series | 8200 Series Mortise Lockset |
| Model / Function | 8225 — Dormitory Function (ANSI F82) |
| Trim Designation | LNL Lever |
| Keyway | LA Keyway (Sargent 40 Series Mortise Cylinder) |
| Lock Type | Full Mortise |
| Grade | Commercial Grade |
| Category | Mortise Locksets |
| Standard | ANSI/BHMA A156.13 (Mortise Locks and Latches) |
| Outside Lever Operation | Locked; retracted by key or inside thumbturn |
| Inside Lever Operation | Always free for egress |
| Typical Applications | Dormitories, student housing, multi-family residential, institutional |
| 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 | F12 - Dormitory |
| Trim Design | LNL |
| Series | Sargent - 8200 Series |
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