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Sargent 8239 LNL Classroom Security Function Mortise Lockset w/ Deadbolt - LA Keyway
The Sargent 8239 LNL is the ultimate high-security Grade 1 Mortise Lockset, combining advanced "Intruder" classroom security with the physical powerhouse of an integrated deadbolt. Designed for K-12 schools, universities, and government facilities, the 8239 Classroom Security Intruder Deadbolt Function (ANSI F33) allows staff to lock down a room instantly from the inside using a key. Part of the legendary Sargent 8200 Series, this lockset far exceeds ANSI/BHMA A156.13 standards, making it the premier choice for openings that require maximum resistance to forced entry and absolute life-safety compliance.
Dual-Cylinder Intruder Deadbolt Security (ANSI F33)
The 8239 function provides a multi-layered defense strategy. It allows for the projection of a heavy-duty deadbolt while simultaneously controlling the locking status of the exterior lever.
- Key-Driven Lockdown: A key from either the inside or outside retracts or projects the deadbolt. Projecting the deadbolt automatically locks the outside lever, preventing entry.
- Deadbolt Protection: Features a 1" throw hardened stainless steel deadbolt for maximum resistance against kick-ins and physical attacks.
- Automatic Interior Unlocking: Regardless of the deadbolt's position, the inside lever retracts both the latchbolt and the deadbolt simultaneously with a single motion. This "single-motion egress" ensures that occupants can always exit the room instantly, fulfilling strict life-safety and fire code requirements.
- Visual Status: The position of the deadbolt serves as a clear indicator of the door's security status during high-stress lockdown events.
Architectural LNL Trim & Performance
The LNL trim (L-Lever with LN-Rose) provides a modern, professional appearance that is engineered to survive the most abusive high-traffic environments.
- ADA Compliance: The linear L-Lever is ergonomically shaped for ease of use, meeting all ADA accessibility codes.
- Unmatched Durability: UL-verified to exceed 14 million cycles—14 times the requirement for Grade 1 certification. It is constructed with a 12-gauge heavy-duty wrought steel case and cold-forged steel hubs to prevent mechanical failure.
- Lever Sag Prevention: Equipped with high-carbon steel spring cartridges that keep the levers perfectly level and horizontal throughout the life of the opening.
Key Product Features
- ANSI/BHMA Grade 1 & Security Grade 1: Certified for the highest level of mechanical performance and forced-entry resistance.
- Classroom Security Deadbolt (F33): Key from either side projects/retracts deadbolt and locks/unlocks outside trim.
- LA Keyway Standard: Includes two Sargent LA Keyway 6-pin brass cylinders, making it compatible with existing Sargent master key systems.
- Fire Rated Safety: UL/cUL Listed for use on 3-hour fire-rated doors, maintaining the fire barrier during emergencies.
- Auxiliary Deadlatch: Includes a stainless steel deadlatch to prevent "shimming" or unauthorized manipulation of the latchbolt.
- Field Reversible: The non-handed chassis is easily adapted to any door swing during installation.
Technical Specifications
| Feature | Details |
| Function | 39 Classroom Security Intruder w/ Deadbolt (ANSI F33) |
| Series | 8200 Heavy-Duty Mortise |
| Lever Style | LNL (L-Lever with LN-Rose) |
| Deadbolt | 1" Throw Hardened Stainless Steel |
| Latchbolt | 3/4" Throw Stainless Steel Anti-Friction |
| Cylinders | Double 6-Pin Brass, LA Keyway |
| Backset | 2-3/4" (Standard for Mortise Locks) |
| Warranty | 10-Year Mechanical Limited Warranty |
Ordering & Installation Information
The Sargent 8239 LNL is designed for elite-level facility protection. For doors thicker than 1-3/4", please specify the door thickness at the time of order. This hardware is fully compatible with Sargent High-Security Key Systems, including Degree®, Signature, and Keso, as well as Interchangeable Core (IC) formats for rapid re-keying.
| 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 | F32 - Classroom Security (dbl cyl) |
| Trim Design | LNL |
| Series | Sargent - 8200 Series |
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