Dexter C1000 Series Grade 1 Cylindrical Lock - Asylum (F87)

It ships with a 1-1/8 x 2-1/4 inch square-corner beveled latch front and an ANSI 1-1/4 x 4-7/8 inch curved lip strike. If your frame is already prepped for the ANSI 4-7/8 inch strike and a 2-3/4 inch backset, this drops straight in. A frame cut for a smaller T-strike or an older 2-3/8 inch backset bore is not a direct swap.

It takes a conventional 6-pin cylinder in the Schlage C keyway, keyed different as supplied, so a locksmith can rekey or master key it into an existing Schlage C system. It also accommodates small format interchangeable core in 6-pin or 7-pin if your building runs SFIC. Note the double cylinder function means two cylinders per lock, one each side.

Within cylindrical asylum hardware, the Arrow MK33-BD-CS is the nearest counterpart. It is an asylum/institution/utility function cylindrical lock with a conventional cylinder in the Schlage C keyway, matching the Dexter C1000 asylum lock's conventional 6-pin Schlage C keyway cylinder. The differences are trim and grade: the Arrow MK33-BD-CS carries a ball knob and is rated Grade 2 heavy duty, while the Dexter C1000 asylum is a Grade 1 leverset. If the opening needs a lever for ADA-style operation, the Dexter is the lever version of that same key-both-sides function; if a knob is acceptable or preferred to discourage tampering, the Arrow covers the same function.

They control different things. The Dexter C1000 asylum lock is a double cylinder keyed function, meaning it is keyed on both sides and the lever will not retract the latch without a key from either direction. A storeroom lever such as the Hager 2580 or the Cal-Royal AG05 is keyed outside only, with the inside lever always free to exit; the Cal-Royal AG05 uses a deadlocking latchbolt for that outside-secure arrangement. Both Hager 2580 and Cal-Royal AG05 are Grade 2 storeroom function. Choose asylum only when the opening is meant to be key controlled in both directions, such as a utility or secure holding room; anywhere free egress by lever is required, storeroom is the function to specify.

The Dexter C1000 asylum lock covers a 1-3/8 inch to 2 inch door thickness range, so it suits thinner leaves as well as standard 1-3/4 inch doors. For the non-keyed openings in the same run where the same Grade 1 duty is wanted, the Falcon K101 is a Grade 1 heavy duty passage cylindrical lock, fire rated, with a 1-3/8 inch to 2-1/4 inch door thickness range, so it spans the same thin doors. The Corbin Russwin CL3110 is also a Grade 1 fire rated passage lever, but its range starts at 1-3/4 inch, as does the Design Hardware X75 at 1-3/4 inch, so neither one reaches a 1-3/8 inch door.

The Dexter C1000 asylum lock ships with a conventional 6-pin cylinder in the Schlage C keyway, and it also accommodates SFIC in 6-pin or 7-pin. Two other lines carry the same keyway natively: the Arrow MK33-BD-CS asylum lock uses a conventional Schlage C keyway cylinder, and the Cal-Royal AG00 entrance lever is a 6-pin Schlage C keyway supplied keyed different. For Yale hardware in the same building, the Accentra 107S is a Schlage cylinder adapter kit that lets Yale hardware take a Schlage cylinder. That combination lets a facility run one key system across asylum, entrance, and Yale openings.

The Dexter C1000 asylum lock is built on a 2-3/4 inch backset with an ANSI 1-1/4 inch by 4-7/8 inch curved lip strike, so it wants a standard commercial 2-3/4 inch prep. The Cal-Royal AG00 entrance lever is a 2-3/8 inch backset set, and the Cal-Royal AG03 classroom lever in the AG Series is 2-3/4 inch. Measure from the door edge to the center of the bore before ordering; a 2-3/8 inch bore will not take a 2-3/4 inch lock without redrilling the door and cutting a new strike pocket.

What you do need to pick is trim style: the C1000 asylum lock comes in Curved and Regular lever trim. Match the trim to whatever else is on the corridor so the utility rooms don't look different from the offices.

Grade 1 is the top ANSI/BHMA cylindrical grade for cycle life and strength, which is what you want on a mechanical or electrical room that maintenance hits daily and on doors where a lever gets abused. If the opening is low traffic, ZenSupply carries the Arrow MK33-BD-CS, a Grade 2 heavy duty asylum lock with the same Schlage C keyway, though it's a ball knob rather than a lever.

The C1000 asylum lock is a lever handle design, which is what accessibility guidelines call for over a round knob since it operates without tight grasping or twisting. Both trim options, Curved and Regular, are levers. The keyed-both-sides F87 function is the part to watch on any door in an accessible route.

For standardizing a facility on Grade 1 cylindrical levers with different functions, ZenSupply carries the Corbin Russwin CL3110 passage/closet in the vandal resistant CL3100 Series, fire rated and for 1-3/4 to 2 inch doors, and the Falcon K101 Grade 1 passage in the K Series, fire rated with a 1-3/8 to 2-1/4 inch thickness range. For a keyed door where people still need to get out freely, neither of those nor the asylum function applies, you want storeroom.

Yes. The 1-3/8 to 2 inch range covers older 1-3/8 inch interior doors, which is broader than many commercial Grade 1 levers, several peers we carry, like the Corbin Russwin CL3110, start at 1-3/4 inches. You still need a 2-1/8 inch cross bore at a 2-3/4 inch backset and an ANSI strike prep in the frame.

A cylindrical lock like the C1000 installs into a standard 2-1/8 inch cross bore with a 2-3/4 inch backset, so it goes into a stock hollow metal or wood door with no pocket prep and it's the faster retrofit on an existing bored opening. A mortise lock needs a milled pocket in the door edge and is the choice when you want deadbolt and latch in one case or heavier abuse resistance. If the doors are already bored, stay cylindrical.

No, they solve a different problem. The Dexter C1000 asylum lock is a double cylinder keyed function on a Grade 1 cylindrical lever, controlled by a Schlage C keyway cylinder in both directions. Keyless levers such as the Lockey 2835 and the Lockey 1150 are passage function mechanical keypad locks, and the Lockey 2835DC is a double combination keyless lever, also passage function; the Delaney LP250 is a Grade 2 electronic keypad leverlock. Passage function means the lever retracts the latch once the code is entered and the inside is free, so none of them hold an opening key secure on both sides the way an asylum function does. If the goal is removing keys from the opening rather than key control in both directions, the Lockey units apply; for a secure utility or holding room, they do not.

The Dexter C1000 asylum lock is a keyed cylindrical leverset for openings that need key control on both sides. For the inactive leaf of a pair or a closet face where no latch operates, a dummy trim is the match: the BEST 9K Series 1DT is a Grade 1 heavy duty single dummy trim cylindrical lever, and the Accentra 455LN Augusta is a Grade 1 single dummy cylindrical lever lock. Where medium duty is acceptable, the BEST 7KC Series 1DT is a Grade 2 single dummy trim lever. Specifying dummy trim in the same duty class keeps the lever appearance consistent across a corridor without paying for lock function that will never be used.

The Dexter C1000 asylum lock is mechanically keyed on both sides with a conventional cylinder. Where the door has to release from a credential reader or fire alarm interface instead, the Corbin Russwin CL33903 is a Grade 1 fail safe electrified cylindrical lever in the CL33900 Series, offered in a 12VAC/DC keyed version, with a 1-3/4 inch to 2 inch door thickness range. Fail safe means the lever unlocks when power is removed, which is the opposite behavior from a key held asylum function, so confirm which state the occupancy code requires for that room before swapping. Note the electrified unit needs 1-3/4 inch minimum door thickness, while the Dexter C1000 starts at 1-3/8 inch.

They are different functions despite both restricting entry. The Dexter C1000 asylum lock is keyed on both sides and requires a key to retract the latch from either direction. A privacy lever such as the Hager 2540 or the Kwikset 300BRNL Breton locks from the inside by thumbturn or button and releases for egress without a key; the Arrow MK02-TA is a privacy knob with a fire rating and no keyed cylinder. Public restrooms and exam rooms almost always want privacy so an occupant is never trapped; asylum function is for utility and secure institutional rooms where staff key control governs both sides.

The Dexter C1000 asylum lock is Grade 1 and UL listed 3 hour, with a 1-1/8 inch by 2-1/4 inch square corner beveled latch on a 2-3/4 inch backset and an ANSI 1-1/4 inch by 4-7/8 inch curved lip strike, which is the strike prep a commercial frame is already cut for. Grade 1 peers in the same cylindrical lever family include the Falcon T101 heavy duty and the Corbin Russwin CL3110 vandal resistant, both non-keyed passage. Levers such as the Hager 2510, the Falcon B101 and the Accentra 5301LN Augusta are Grade 2, and the Callan Asheville, the Kwikset 200BRNL Breton and the Master Lock BC Series are Grade 3. For an institutional corridor being standardized, matching grade and strike prep across openings matters more than trim style.

The Dexter C1000 asylum lock is keyed on both sides, so neither lever retracts the latch without a key. A classroom lever such as the Cal-Royal AG03, a 6-pin Schlage C keyway set on a 2-3/4 inch backset, keys the outside to lock or unlock while the inside lever stays free. Entrance and office levers, including the Falcon B511CP6D Grade 2 entry/office and the Hager 2525 Grade 2 commercial entry, also leave the inside operable. Classrooms and offices need free egress; asylum function belongs on mechanical rooms, storage, and secure institutional spaces where the inside is deliberately key controlled too.

Commercial. It's a Grade 1 cylindrical lock built for institutional openings, not a residential leverset. For comparison, residential-grade options we stock like the Kwikset 200BRNL Breton are Grade 3 and only cover 1-3/8 to 1-3/4 inch doors with a passage function, no keying at all.