Sargent 8204 LNB Trim Storeroom or Closet Function Mortise Lockset

The Sargent 8204 LNB brings together the precision of the Sargent 8200 Series mortise platform and the disciplined geometry of the LN Rose with B lever trim in a single, specification-ready storeroom lock. The 8204 storeroom/closet function (ANSI F07) delivers controlled, key-only entry from the outside while preserving free egress from the inside at all times — the correct mechanical logic for storage rooms, server closets, supply areas and similar spaces where occupant escape must never be impeded but unauthorised entry must be. At just 2 inches in diameter, the LN rose covers the minimum door face necessary to conceal the cylinder bore, keeping the hardware schedule clean and the door panel visually uncluttered. The result is a Grade 1 mortise lock that reads with quiet authority on the door without visual bulk.

8204 Storeroom/Closet Function — ANSI F07: Key-Controlled Entry, Always-Free Egress

The 8204 is defined entirely by its access asymmetry: the outside trim is locked at all times and will not operate without a key, while the inside trim retracts the latchbolt freely on every turn. That single-cylinder, no-deadbolt architecture — no thumbturn, no occupancy indicator — is precisely what ANSI F07 prescribes for storeroom and closet applications where security outward matters and exit certainty inward is non-negotiable.

• Key-Only Outside Entry: A key inserted in the outside cylinder retracts the latchbolt; without it, the outside lever is locked at all times. Because the 8204 has no deadbolt and no thumbturn, there is no secondary bolt to manage — the cylinder is the sole means of outside entry, simplifying key-control audits and reducing the number of field-adjustable components.
• Always-Free Inside Egress: The inside trim retracts the latchbolt on every operation, regardless of the outside lock state. This unconditional egress behaviour is built into the ANSI F07 function and resists defeat without disassembling the lock — a design characteristic that supports life-safety compliance in occupied facilities.
• Stainless Steel Auxiliary Deadlatch: The auxiliary deadlatch is stainless steel and non-handed. When the door closes, it depresses against the strike and prevents the latchbolt from being pushed back silently — guarding against shimming the latch without a key. Its non-handed design is consistent with the lock body's own field-reversibility.
• Anti-Friction Stainless Steel Latchbolt: The one-piece latchbolt offers a 3/4" (19mm) throw and is constructed from stainless steel with an anti-friction feature. Only 30 degrees of lever rotation is required to retract it fully, reducing the physical effort needed for egress — a practical benefit on high-traffic doors and one of the reasons the 8200 Series meets its ADA lever-operation requirements.

LN Rose (2" dia) × B Lever: A Compact Trim Profile That Holds Its Place in Any Schedule

The LNB trim pairs a round LN rose at a precise 2-inch diameter with the B lever — a combination whose value to a specifier is legibility. On a hardware schedule covering dozens of openings, the LN rose's small, defined footprint and the B lever's distinct profile make finish-and-function verification straightforward. On the door itself, that 2-inch rose exposes almost no door face beyond what the cylinder bore demands.

• 2" LN Rose — Minimal Door Coverage: The LN rose is 2 inches in diameter, one of the smallest rose formats in the 8200 trim range. Because it covers only the area immediately surrounding the cylinder, it is well suited to doors where the panel design or finish should read with as little hardware interruption as possible.
• B Lever — Non-Handed Trim: The B lever trim is non-handed, meaning a single ordered unit installs correctly on left-hand or right-hand doors without any field modification to the trim itself. This is separate from the lock body's field-reversibility: the body re-hands without opening the case, while the B lever requires no handing decision at all.
• 30-Degree Lever Rotation and Case-Contained Springs: Only 30 degrees of lever rotation is required to retract the latchbolt fully, and the lever return springs are contained inside the lock case rather than in the trim assembly. Both characteristics simplify installation — the trim goes on clean, with no loose spring components to manage — and contribute to the lever's consistent, low-effort operation over the lock's service life.
• ADA Lever Operation and Interchangeable Trim: The lever handle format complies with the American Disability Act; consult local authorities to confirm applicability to your jurisdiction. Trim is through-bolted and fully interchangeable between rose and escutcheon configurations, so the lever and rose assembly can be repositioned or substituted without compromising alignment.

Function (Sargent Catalog)

• Key outside retracts latchbolt
• Trim outside locked at all times
• Trim inside always retracts latchbolt
• Auxiliary deadlatch
• A Multi-Function 8200/7800 Lockbody

Key Product Features

• 16 Million Cycle Verified Durability: The Sargent 8200 Series completed a UL cycle test at 16 million cycles — 16 times the ANSI/BHMA A156.13 Grade 1 requirement — with Verification ID V584148. For a storeroom lock in a high-traffic institutional or commercial facility, that margin translates directly into extended service intervals.
• ANSI/BHMA A156.13 Series 1000 — Operational Grade 1 and Security Grade 1: The 8204 LNB with standard cylinder trims is certified to and exceeds ANSI/BHMA A156.13 Series 1000, Operational Grade 1 and Security Grade 1. Note: LFIC and SFIC cylinder options available on this listing do not meet Security Grade 1 requirements — specify the LA keyway or LC less-cylinder option where Security Grade 1 is mandatory.
• 12-Gauge Zinc-Dichromate Steel Case with Cold Forged Steel Hubs: The lock case is 12-gauge heavy-duty wrought steel, zinc dichromate plated, at 7/64" (3mm) thickness. The 8200 Series hubs are cold forged steel — distinct from the sintered iron used in the 7800 line — backed by a heavy-duty wrought steel hub and high-carbon steel spring cartridge for superior strength across the lock's service life.
• UL/cUL 3-Hour Fire Listed and UL 10C Positive Pressure Rated: The lock is UL and cUL Listed for A-label 4×10 single and 8×10 double (3-hour fire door) and lesser-class doors, listed to both US and Canadian safety standards. It also meets ANSI/UL 10C Positive Pressure Fire Test requirements. The armored front is stamped with the letter F and the UL symbol to confirm the listing at installation inspection.
• Cylinder and Keyway Options: This listing is offered in four cylinder configurations: LC (Less Cylinder), LA Keyway (standard brass #41 / 1-1/8" cylinder, masterkey and grand masterkey capable, construction keying available), 60 (LFIC Less Core), and 70 (SFIC Less Core). LFIC and SFIC cores do not meet ANSI/BHMA A156.13 Security Grade 1. Two nickel-silver keys are included with keyed cylinders.
• 10-Year Limited Mechanical Warranty and Field-Reversible Lock Body: Sargent backs the 8200 Series with a 10-year limited mechanical warranty (limited to replacement of the lock body). The lock body re-hands in the field without removing parts or opening the lock case, reducing installation time on mixed-handing projects — no separate left-hand or right-hand lock body SKU is required.

Technical Specifications

Ordering & Installation Information

The 8204 LNB is a factory order item with a 3–4 week lead time. Door preparation follows ANSI/SDI A250.14 modified per template 7057; confirm your door blank is prepped to this template before ordering. The lock requires a 2-3/4" (70mm) backset — no other backset is available — and a minimum 4-1/2" (114mm) stile width; both are hard ordering constraints that must be verified against the door specification before the item ships. Standard door thickness is 1-3/4" (44mm); the 8200 Series is available for doors from 1-3/8" to 6" thick, but non-standard thicknesses must be specified at time of order. The lock body is field reversible without opening the case; the B lever trim is non-handed and requires no handing selection on this order. Choose from six finishes: 626 Satin Chrome, 630 Satin Stainless, 613E Oil Rubbed Bronze Equal, 605 Polished Brass, 612 Satin Bronze, or 625 Polished Chrome. Cylinder options are LC, LA, 60 (LFIC Less Core), or 70 (SFIC Less Core). The broader 8200 Series also offers MicroShield antimicrobial finish coating, status indicators, ElectroLynx electro-mechanical configurations, and vandalism-deterrent secure-fastener trim options — consult DoorwaysPlus for separately specified configurations.