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Sargent LC-12-8904-G-ETJ Fire Rated Mortise Exit Device, Night Latch, For 43-48" Dr Widths, Less Cylinder
The Sargent LC-12-8904-G-ETJ is a fire rated mortise exit device built for high-traffic commercial openings that demand reliable security and dependable egress. Configured for night latch function with the ETJ lever trim and G grip design, this unit provides keyed exterior access while allowing free exit from the interior at all times. Sized for 43" to 48" door widths and supplied less cylinder, it lets installers specify their preferred mortise cylinder to match an existing keying system. As part of Sargent's 8900 series, it delivers the durability, code compliance, and smooth operation expected on institutional, educational, and healthcare doors.
Features
- Fire rated mortise exit device suitable for labeled door openings requiring positive latching.
- Night latch (NL) function with ETJ lever trim for keyed exterior access and free interior egress.
- Designed to fit door widths from 43" to 48".
- Supplied less cylinder, allowing use of a preferred mortise cylinder.
- Heavy-duty mortise lock case for long service life in demanding applications.
- Smooth push-pad activation for intuitive, code-compliant exit.
Functional Details
The night latch function provides controlled entry and continuous free egress. Turning the key retracts the latch for momentary access, while the interior push pad always allows immediate exit, making it ideal for secured perimeter doors.
- Night Latch: Exterior trim is key operated to retract latchbolt; free egress at all times from the inside.
Arm Type Details
The ETJ designation refers to the lever trim used for exterior control. The J lever features a return-to-door design that reduces catch hazards and meets accessibility requirements, paired with the G grip escutcheon for a clean, durable appearance.
Included Components
This order includes the mortise exit device chassis, ETJ lever trim, and mounting hardware. A mortise cylinder is not included and must be ordered separately.
| Manufacturer | Sargent |
| SKU | LC-12-8904-G-ETJ |
| Series | 8900 Mortise Exit Device |
| Function | Night Latch (NL) |
| Grade | ANSI/BHMA Grade 1 |
| UL Listing Type | Fire Rated / UL Listed for Panic Hardware |
| ANSI Number | ANSI/BHMA A156.3 |
| Cylinder | Less Cylinder (not included) |
| Trim | ETJ Lever with G Grip |
| Origin | USA |
| Unit of Measure | Each |
| Limited Warranty | Manufacturer limited warranty |
| Device Type | Mortise Lock Exit Device |
| Door Width Range | 43" to 48" |
| Fire Rating | Up to 3 hours (labeled openings) |
| Latchbolt Throw | 3/4" |
| Backset | 2-3/4" |
| Door Thickness | 1-3/4" standard |
| Cylinder Type | Mortise cylinder (field supplied) |
| Mounting | Surface mounted with mortise lock case |
| Door Type | Single door application |
| Compliance | ANSI/BHMA A156.3 Grade 1, UL Listed |






