?unique=a0af21d)
?unique=a0af21d)
Sargent 8255 LNL Office Function Mortise Lockset — Commercial Grade | LA Keyway
The Sargent 8255 LNL is a heavy-duty, commercial-grade mortise lockset engineered for office-function applications in institutional, government, healthcare, education, and corporate facilities. Built on the proven Sargent 8200 Series mortise platform, this lockset combines robust mechanical performance with the LNL trim designation and the LA keyway — a configuration trusted by architects, specifiers, and facility managers who demand long-term reliability and compatibility in high-traffic door openings.
Office Function (ANSI/BHMA Function Explained)
The Office Function lockset operates as follows: the latch bolt is normally retracted by lever from either side. A push button or turn on the inside can lock the outside lever, requiring a key for entry — ideal for private offices, consultation rooms, and staff areas where the occupant needs the ability to secure the room from within without permanent key control. Turning the inside lever always provides free egress regardless of the locked/unlocked state.
Key Features & Benefits
- Sargent 8200 Series Mortise Body — industry-recognized heavy-duty mortise chassis suitable for high-cycle, high-traffic commercial doors
- LNL Trim Designation — Sargent's standard lever-on-lever trim configuration; compatible with Rockwood custom push plates for surface cosmetic work when needed
- LA Keyway — Sargent open conventional keyway profile, enabling straightforward key system integration and re-keying in the field
- Office Function — inside push-button/turn locking with free egress from the inside at all times; key resets the outside lever to passage
- Commercial Grade Construction — designed for ANSI/BHMA Grade 1 performance standards common to the 8200 Series mortise product line
- Master Keying Compatible — Sargent 40 Series mortise cylinder supports multi-level master key systems including grand master and construction keying
- Fire Door Compatible — mortise lock format is appropriate for UL-listed fire-rated door assemblies when paired with compliant frames and closers (verify listing for your specific assembly)
Typical Applications
- Private offices and executive suites in commercial office buildings
- Government and federal facility interior secured offices
- Healthcare consultation and staff rooms
- Educational administrative and faculty offices
- Military and institutional applications requiring push-button office lockdown capability
Technical Details
| Feature | Details |
|---|---|
| Manufacturer | Sargent Manufacturing (ASSA ABLOY) |
| Model / Series | 8255 — 8200 Series Mortise Lockset |
| Trim Designation | LNL (Lever / Lever trim) |
| Lock Function | Office Function — inside push-button locking; free egress always |
| Keyway | LA Keyway (Sargent open conventional) |
| Lock Type | Mortise Lockset |
| Grade | Commercial Grade (Heavy Duty) |
| Cylinder Type | Sargent 40 Series Mortise Cylinder (6-pin standard) |
| Master Keying | Compatible with Sargent multi-level master key systems |
| Category | Mortise Locksets |
For facilities requiring compatible trim accessories — including custom stainless steel push plates prepped for the LNL configuration — Rockwood custom push plates are a proven solution for covering surface imperfections around 8200 Series mortise lock installations. Contact our team for specification assistance or to request a quote on comparable mortise lockset alternatives from preferred lines including Corbin Russwin, PDQ, and Hager.
| 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 |
Recently Viewed Items