Schlage Commercial 20-204 Sub-Assembled Key in Lever Cylinder, S123 Keyway

The Falcon A23161-05 G is the nearest counterpart in the group. Both are 6-pin key in lever cylinders: the Schlage 20-204 is a cylindrical lever cylinder, 6-pin, cut to the S123 keyway and supplied sub-assembled with multiple tailpieces covering the A and H-Series Orbit A301-338, AL-Series A700-031, D-Series levers and knobs C604-243, and ND-Series N523-022. The Falcon A23161-05 G is a key in lever cylinder for the RU/T series in Falcon's 6-pin G keyway, and it comes keyed different with two cut keys. The two differences that decide the order are keyway family, which means keys and any existing master system will not carry across, and that the 20-204 ships without keys or parts, so a locksmith pins and cuts it to the system on site.

Cylinder only. The 20-204 is the keyed plug assembly that seats in a Schlage cylindrical lever or knob and drives the lock through a tailpiece. It is not the lockset, and it is not the lever trim. Schlage sells it as a replacement part for commercial locks, and keys and parts are not included in the box.

It arrives sub-assembled with no keys and no parts included, so a locksmith pins it to your keying and cuts the keys. That is exactly what makes it work on a master keyed building: the 6-pin cylinder goes into your existing S123 system instead of arriving keyed different on a key you would then have to carry separately. Budget cut keys and pinning parts as their own line items.

Only if your system runs on the S123 section. S123 is one specific Schlage keyway, and a key cut on a different section will not enter the plug no matter how the cylinder is pinned. Check the keyway stamp on your current key or your keying schedule before you order. Both finishes offered, 626 satin chrome and 606 satin brass, are S123.

Handing does not apply. The 20-204 is non-handed, so the same cylinder goes into a left hand or a right hand door. For a property manager or MRO buyer standardizing across a building, that means one model number covers every opening, and the only choice left on the order is finish: 626 satin chrome or 606 satin brass.

The Falcon A23161-05 G is the key-in-lever cylinder for Falcon RU and T Series locks, 6-pin on the G keyway. One practical difference at the order form: the Falcon comes keyed different with two cut keys, while the Schlage 20-204 ships with no keys and gets pinned to your system. Pick by the brand of lock actually in the door, because tailpieces and keyway sections do not cross between the two.

No. A mortise cylinder threads into a mortise lock case and turns a cam; the 20-204 is a cylindrical lever cylinder that seats in a knob or lever and drives a tailpiece. Mortise cylinders such as the Detex MC65 (6-pin, Schlage C keyway, 1-1/8 inch) or the Corbin Russwin 1080 LFIC mortise cylinder for Schlage L9000 locks belong to that other body style. Confirm whether the door has a mortise case or a cylindrical lockset first.

Not a conversion part. The 20-204 is a conventional cylinder that gets pinned to your keying and stays in the lever; an interchangeable core pulls with a control key and needs hardware prepped to accept a core. If moving the building to IC is the goal, the core products to look at are the BEST 1C Series standard 5-pin core and the BEST Peaks 1CB 150 Series, and they only drop into IC-prepped locks.

They are different jobs. The Kaba Ilco 1549 is a key-in-deadbolt cylinder, listed with a deadbolt function, so it serves the deadbolt on the door. The Schlage 20-204 is a cylindrical lever cylinder that goes into key in lever trim, with tailpieces for the A and H-Series Orbit, AL-Series, D-Series levers and knobs, and ND-Series. If the part being replaced is in a knob or lever rather than a deadbolt, the Ilco parts that line up are the 1539 key-in-knob and lever universal cylinder or the 1599 key-in-knob replacement cylinder.

No, and the keyway is what makes the two look closer than they are. The Detex MC65 is a mortise cylinder, 1-1/8 inch, 6-pin, in the Schlage C keyway - a mortise cylinder threads into the case of a mortise lock. The Schlage 20-204 is a cylindrical lever cylinder, 6-pin, that seats in key in lever trim and drives the lock through one of its tailpieces. The keyways also differ: the MC65 is Schlage C and the 20-204 is S123, so keys from one will not operate the other even where both are Schlage keyways.

The 20-204 is a cylindrical lever cylinder and belongs in key in lever trim, so a mortise case needs a mortise cylinder. Corbin Russwin lists the 1000 Grade 1 mortise cylinder at 1-1/2 inch length with an A02 straight cam, and the 1070 Grade 1 6-pin mortise housing at 1-1/4 inch with an A01 cloverleaf cam - cam style is what has to match the lock case. Adams Rite lists the 4036 mortise cylinder, five-pin, Grade 1, 4036 Series, with a 1/2 inch minimum door thickness. Where the mortise lock is a Schlage L9000, the Corbin Russwin 1080 Grade 1 is the one built for it: a 1-1/2 inch LFIC mortise cylinder, 6-pin, with the A01 Schlage L cam.

The 20-204 is a conventional sub-assembled 6-pin cylinder - the keying lives in the cylinder itself, so changing it means the cylinder goes to a locksmith to be repinned. The interchangeable core route puts the keying in a core that lifts out as a unit. BEST lists the 1C standard 5-pin cylinder core, the Peaks 1CB 150 Series interchangeable core cylinder, and the 1CDF, a drill resistant preferred patented interchangeable core in 7-pin brass, 150 Series, when the facility also wants key control on a patented system. Interchangeable cores only drop into hardware prepped for them, so the decision is usually made at the lock, not at the cylinder.

No. The 20-204 is a cylindrical lever cylinder with tailpieces cut for Schlage lever and knob trim - A and H-Series Orbit A301-338, AL-Series A700-031, D-Series C604-243, and ND-Series N523-022. A rim application takes a rim cylinder: Corbin Russwin lists the 3070 6-pin rim cylinder housing with a 1-7/8 inch tailpiece in the 3000 series. Where the opening needs the cylinder appearance with no key function, BEST lists the 12E Series dummy rim cylinder at 1-5/32 inch diameter.

The 20-204 is a commercial cylindrical lever cylinder, and its tailpieces are cut for Schlage commercial lever and knob families, so it is not the part for a handleset or a residential deadbolt. Medeco covers those: the 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts, the 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, the 1065244 is a 5-pin rim lazy motion cylinder with an Emtek tailpiece, and the 1065140 is a 5-pin retrofit cylinder for the Arrow JL interconnected lock and for Emtek handleset and deadbolt outside cylinders. Emtek also lists the CY4 cylinder, sold each, for its own hardware.

No - the 20-204 seats in Schlage key in lever trim and is non-handed for that application, not for a narrow stile deadlock. Adams Rite covers the MS1847 openings with cylinder pulls: the 4024 cylinder pull with trim plate mounting for MS1847 deadlock systems, and the 4025 five pin tumbler cylinder pull with through-screws for the MS1847 - the mounting method is the choice between them. On a wood door, the Adams Rite 4026 five pin tumbler cylinder pull is the one designed for the 5017 wood door deadlock and deadlatch.