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Sargent LC-8904-J-ETB Mortise Exit Device, Night Latch, For 37-42" Dr Widths, Less Cylinder
The Sargent LC-8904-J-ETB is a heavy-duty mortise exit device engineered for high-traffic commercial openings that demand reliable security and dependable performance. Configured for night latch function with the ETB lever trim and J design, this device fits door widths from 37 to 42 inches and ships less cylinder, giving you the flexibility to pair it with your preferred mortise cylinder. Built to the exacting standards of the Sargent 8900 series, it combines a robust mortise lock body with smooth, consistent latching for secure egress. This model is an excellent choice for schools, healthcare facilities, offices, and institutional buildings where durability and code compliance are essential.
Features
- Night latch function allows key access from the outside while providing free egress from the inside.
- Mortise-style exit device from the dependable Sargent 8900 series platform.
- Sized for door widths ranging from 37 to 42 inches.
- Supplied less cylinder for compatibility with your chosen mortise cylinder.
- ETB lever trim with J design for a clean, ergonomic appearance.
- Heavy-duty construction built for high-frequency commercial use.
Functional Details
The night latch (904 function) provides key-operated entry from the exterior while allowing unrestricted free egress at all times from the interior push bar. This makes it ideal for secured entrances where controlled outside access is required.
- Night Latch - Key outside unlatches/retracts latch.
- Latchbolt operated by lever/push pad from inside at all times.
Arm Type Details
The ETB trim designation refers to the escutcheon lever trim with the B lever style and J rose/escutcheon design, offering a comfortable grip for pull-side access when used with the night latch function.
Included Components
This package includes the mortise exit device chassis with mortise lock body, the ETB-J lever trim, and standard mounting hardware. A mortise cylinder is not included and must be ordered separately.
| Manufacturer | Sargent |
| SKU | LC-8904-J-ETB |
| Series | 8900 Mortise Exit Device |
| Function | Night Latch (904) |
| Grade | ANSI/BHMA Grade 1 |
| Origin | Made in USA |
| Unit of Measure | Each |
| UL Listing Type | UL/cUL Listed for Panic Hardware |
| ANSI Number | ANSI/BHMA A156.3 |
| BAA Qualified | Yes |
| Cylinder | Less Cylinder (not included) |
| Trim | ETB Lever, J Design |
| Limited Warranty | Yes |
| Device Type | Mortise Exit Device |
| Door Width Range | 37 in. to 42 in. |
| Minimum Stile Width | 4-1/2 in. |
| Door Thickness | 1-3/4 in. standard |
| Backset | 2-3/4 in. |
| Latchbolt Throw | 3/4 in. |
| Deadlocking Latchbolt | Stainless steel |
| Cylinder Type | Mortise cylinder (1-1/4 in.) |
| Mounting | Surface-mounted on door |
| Handing | Non-handed / Reversible |
| Fire Rating | Available for fire-rated doors |






