By Kent · Lock Depot Staff Writer

Why a mortise lock with a deadbolt has so many model numbers

Open the Yale 8800FL page and you will find a long run of near-identical part numbers. 8847, 8860, 8861, 8867, 8823: each is a heavy-duty mortise lock with a deadbolt, an occupancy indicator and the same lever. The four digits are the function. Yale, now sold under the Accentra name, is the same commercial line a lot of locksmiths still call Yale, so if your hardware schedule says Yale, you are looking at the right lock.

What the number buys you is a different answer to one question: who can do what with the outside lever, the deadbolt and the inside thumbturn. That decides whether a tenant can lock the door from inside, whether the outside is key-only, and whether the deadbolt and lever are tied together. This article walks through the five we have in stock so you can order the one that fits the door.

What they all share

The 8800FL is built on a heavy-duty mortise chassis. From the catalog, the line is certified to ANSI/BHMA A156.13 Series 1000, Operational Grade 1, the top grade. The details we list for these locks:

• Armor front: 8" x 1-1/4".
• Backset: 2-3/4" only.
• Door thickness: 1-3/4" standard.
• Deadbolt: 1" throw, solid investment cast stainless steel.
• Latchbolt: 3/4" throw, stainless steel, one piece, anti-friction.
• Case: wrought steel, zinc dichromated. Non-handed.
• Trim: Augusta lever with Copenhagen rose, single cylinder.

Because the backset is 2-3/4" only, measure before you order. A mortise lock with the wrong backset is a mortise lock you re-prep a door to fit.

8847FL: the entrance lock with a deadbolt

The 8847 is the workhorse. The listing calls it the entrance or apartment function. The outside lever is locked by key, the inside lever is always free to exit, and the deadbolt adds security at the opening. An occupancy indicator shows locked or unlocked at a glance. This is the one for an office entrance, a main door or an apartment front door. The AUR8847FL in satin chrome is the listing to start from.

8860FL: entrance or storeroom

The 8860 is listed as the entrance or storeroom function, again with a deadbolt and an indicator. The catalog description of its function is the same entry behavior as the 8847: key outside, free inside. The difference in the title is the second name, storeroom, which tells you the model number is used for both. If your door schedule calls for a "storeroom" function and gives this number, this is the part. The AUR8860FL in satin chrome is the listing.

If you are not sure which behavior the door needs, tell us how the door is used and who carries a key.

8861FL and 8867FL: the dormitory pair

These two are where buyers get stuck, because the titles share the word dormitory. The 8861 is listed as dormitory or storeroom. The 8867 is listed as dormitory or exit. The function that matters in a dorm room or a rented apartment is the dormitory behavior, which the catalog describes this way: the outside lever is locked by key, and the inside lever and the deadbolt let the occupant secure the opening from within.

The catalog is more specific about the 8861: the latchbolt is retracted by the lever on either side, and the deadbolt is operated by key from outside and by thumbturn from inside. When the deadbolt is projected, the outside lever is automatically locked. When the deadbolt is retracted, the outside lever is automatically unlocked. Tying the lever to the deadbolt is the point. A tenant who throws the deadbolt knows the outside lever is dead, and the key outside still operates the deadbolt. The AUR8861FL in satin chrome is the reference.

The AUR8867FL uses the dormitory name with an exit second function. On paper, the choice between the two is the second name on the listing. If you are ordering to a hardware schedule, order the function name the schedule gives. If the schedule only gives a number from an older Yale catalog, send us the number and we will check which listing matches before you buy. This is a case where a quick question is much cheaper than a return.

8823FL: the storeroom lock

The 8823 is the straightforward storeroom function with a deadbolt. The catalog says the outside lever is always locked and key-access-only, and the inside lever always allows free egress. Nobody wanders in, and nobody is ever stuck inside. The AUR8823FL in satin chrome is the listing. It suits a stockroom, a utility room or an equipment closet where entry is for authorized staff only. It does not give an occupant a way to lock the door from inside, which is the difference from the dormitory pair above.

Picking in thirty seconds

• Main entrance or apartment door, key outside, free exit: 8847.
• Your schedule calls out the 8860 or says entrance or storeroom: 8860.
• Tenant needs to lock from inside with a deadbolt tied to the outside lever: 8861 or 8867, matched to the schedule.
• Staff-only room, outside always locked, free exit: 8823.

For the plain storeroom version without a deadbolt, see our article on the Yale 8800 storeroom lock.

Common questions

Is Accentra the same as Yale?

Yes. The catalog describes Accentra as the commercial line formerly known as Yale, so a lock spec'd as Yale is the right lock.

What grade is the Yale 8800FL?

The catalog lists it as ANSI/BHMA A156.13 Series 1000, Operational Grade 1.

What backset does the 8800FL use?

2-3/4" only, with a 1-3/4" standard door thickness.

Does the deadbolt lock the outside lever?

On the 8861, yes. When the deadbolt is projected, the outside lever is automatically locked, and when it is retracted, the outside lever unlocks.

Can the inside lever always open the door?

On the storeroom function the catalog says the inside lever always allows free egress.

The full line is on our Yale hardware page. For another Yale function question, see the guide to the 5400LN corridor and communicating classroom functions or the note on the 4706LN visual indicator lock. Send us the door and the hardware schedule and we will confirm the part number.