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Sargent LC-8904-J-ETJ Mortise Exit Device, Night Latch, For 37-42" Dr Widths, Less Cylinder
The Sargent LC-8904-J-ETJ is a heavy-duty mortise exit device built for high-traffic commercial openings where durability and reliable security are essential. Configured for night latch function, this device uses an outside lever (J design ETJ trim) to retract the latch only after key access, while free egress is always available from the inside. Designed for doors measuring 37" to 42" in width, it ships less cylinder, allowing you to match the mortise cylinder to your existing keying system. As part of Sargent's respected 8900 series, it delivers the strength and performance commercial facilities depend on for everyday use.
Features
- Mortise exit device engineered for 37" to 42" door widths.
- Night latch function controls outside access by key while allowing free egress.
- J design lever trim (ETJ) provides a comfortable, durable grip.
- Supplied less cylinder for compatibility with your existing keyway.
- Rugged construction suited for high-use commercial and institutional openings.
Functional Details
The night latch (8904) function means the outside lever is always rigid and does not retract the latch on its own. A key in the outside mortise cylinder retracts the latchbolt for entry, while the inside push rail retracts the latch for immediate, code-compliant egress at all times.
Arm Type Details
The ETJ trim uses Sargent's J design lever, pairing with the mortise exit chassis to allow key-controlled outside entry. The lever itself does not operate the latch in night latch mode—entry depends on the mortise cylinder.
Included Components
Device includes the mortise exit chassis, ETJ exterior lever trim with J design lever, and mounting hardware. The mortise cylinder is not included and must be ordered separately.
| Manufacturer | Sargent |
| SKU | LC-8904-J-ETJ |
| Series | 8900 Mortise Exit Device |
| Function | Night Latch |
| Grade | ANSI/BHMA Grade 1 |
| Door Width Range | 37" to 42" |
| Trim Design | ETJ, J Design Lever |
| Cylinder | Less Cylinder |
| Origin | USA |
| Unit of Measure | Each |
| UL Listing Type | Panic Hardware / Fire Exit (where applicable) |
| ANSI Number | A156.3 |
| Limited Warranty | Manufacturer Limited Warranty |
| Device Type | Mortise Lock Exit Device |
| Latchbolt Type | Mortise Latchbolt |
| Latchbolt Throw | 3/4" |
| Minimum Stile Width | 5" |
| Door Thickness | 1-3/4" standard |
| Backset | 2-3/4" |
| Handing | Reversible / Field Handed |
| Cylinder Type | Mortise Cylinder (ordered separately) |
| Mounting | Surface-mounted rail with mortise case |
| Device Length | Sized for 37"–42" door widths |






