Schlage 47273618 ALX Series Deadlatch, 2-3/4" Backset, 1" x 2-1/4" Square Corner

That is exactly what it is cut for. The ALX Series deadlatch is a 2-3/4 inch backset latch, meaning the center of the crossbore sits 2-3/4 inches back from the door edge, and it carries a 1 x 2-1/4 inch square corner faceplate. If your door is bored at 2-3/8 inches instead, this latch will not reach the chassis. Those two backsets are the standard pair in commercial work and they are not interchangeable.

A deadlatch carries a small auxiliary plunger riding alongside the main latchbolt. When the door closes, that plunger lands on the strike face and blocks the latchbolt from being pushed back, which is what defeats carding or loiding the door with a shim. A plain spring latch has no plunger and can be pushed back. The Schlage ALX Series latch is the deadlatching type, so it is the one to use on keyed exterior and corridor openings. On an interior passage or privacy door the deadlatching feature buys you nothing.

Not without reworking the door edge. The ALX deadlatch comes with a square corner faceplate measuring 1 x 2-1/4 inches, which seats in a square-cornered mortise. A radius corner plate sits in a routed pocket with rounded ends. Put a square plate into a radius prep and you get open corners; go the other direction and you are chiseling the pocket square by hand. Match the corner style to what is already cut in the door before you order.

It is the replacement latch for the ALX Series and is made to run with ALX lock trim, so the chassis, lever and rose stay in the door and only the latch comes out. The drive is a square cam, which is the shape the chassis retractor has to engage. If you are pulling a latch from some other maker's cylindrical lock, check the cam shape first, because a round or flat drive will not turn this one.

Only the latch. What ships is the deadlatching latch unit with its 1 x 2-1/4 inch square corner faceplate, the piece that mortises into the door edge and throws the bolt. No lever, rose or cylinder comes with it. It is sold as a replacement part for Schlage ALX Series locks, so it goes into a lock you already have hung or one you are ordering separately.

The Schlage ALX Series deadlatch is 2-3/4 inch backset, so it is the wrong part for a 2-3/8 prep. Deltana's G1RLE238 is a Grade 1 latch in entry function at 2-3/8 inch backset, and the matching G1RLE275 covers 2-3/4 if you have a mix of openings in the building. For passage and privacy doors the same two backsets are the G1RLP238 and G1RLP275. Note those Deltana parts are listed as regular latches, so if the deadlatching plunger is what you are after, keep the prep at 2-3/4.

Nine finishes: 605 bright brass, 606 satin brass, 609 antique brass, 612 satin bronze, 613 oil rubbed bronze, 622 matte black, 625 bright chrome, 626 satin chrome and 643E aged bronze. The only part you see after the door closes is the faceplate on the edge, since the latch body is buried in the crossbore. That matters on openings where doors stand open in a corridor or lobby, so order the faceplate finish to match the lever and hinges rather than defaulting to satin chrome.

Commercial. The ALX Series deadlatch is a stainless steel part, which is what keeps the latch working on exterior and high cycle openings where moisture reaches the door edge and a plated steel latch would eventually bind or rust. Stainless is the sensible call on coastal buildings, pool corridors and loading dock doors. For a facility standardizing on one latch across many openings, the 2-3/4 inch backset is the version most commercial preps use.

Latches are series specific, so the ALX deadlatch is not a universal replacement, it belongs with ALX lock trim. On Dexter C1000 Series locks, the deadlatch built for that series is the correct part. One thing to watch: the Lockey M230 turns up in deadlatch searches, but that is a complete mechanical keyless combination lock with an adjustable backset, not a latch you drop into an existing chassis. If you are only replacing the latch, buy the one that matches the lock brand and series on the door.

Wrong part for that. The Schlage ALX deadlatch is a replacement latch that runs with ALX lock trim on a bored door, not a standalone sidelite latch. For a sidelite, the Accentra YSSL10 security sidelite auxiliary latch is the purpose built option, with an ADA compliant thumbturn, listed for 1-3/4 inch thickness and fire rated. That combination matters when the sidelite sits in a rated opening and the inspector wants an operable thumbturn on the egress side.

Two Deltana latches are built at 2-3/4 inch backset: the G1RLE275, a Grade 1 regular latch in entry function, and the G1RLP275, a Grade 1 regular latch in passage/privacy function. Dexter builds a deadlatch dedicated to its C1000 series locksets. One distinction to settle before you order: the Schlage 47273618 is a deadlatch, while the Deltana G1RLE275 and G1RLP275 are regular latches. Latches are matched to the lock chassis they were built for, so confirm the lock family on the door as well as the backset.

Mechanically it may fit the same bore and backset, but it is not the same part. The Schlage 47273618 is a deadlatch, which carries a secondary plunger alongside the latchbolt; when the door closes, the plunger rides the strike and holds the main bolt from being retracted by a card or shim. The Deltana G1RLE275 and G1RLP275 at 2-3/4 inch backset, and the G1RLE238 and G1RLP238 at 2-3/8 inch, are regular latches. If the opening was specified with a deadlatch for that anti-shim function, stay with a deadlatch: the Dexter deadlatch for the C1000 series is the other deadlatching option, built for Dexter chassis rather than Schlage ALX trim.

The Schlage 47273618 is built at 2-3/4 inch backset with a 1 inch by 2-1/4 inch square corner faceplate, so it will not land correctly on a 2-3/8 inch bore. At 2-3/8 inch, Deltana builds the G1RLE238, a Grade 1 regular latch in entry function, and the G1RLP238, a Grade 1 regular latch in passage/privacy function. If the doors in the building are mixed and you would rather carry one part, the Lockey M230 is a keyless combination lock with an adjustable backset, though that replaces the whole lock rather than just the latch.

Deltana publishes a Grade 1 rating across four regular latches, split by backset and function. At 2-3/4 inch backset: the G1RLE275 in entry function and the G1RLP275 in passage/privacy. At 2-3/8 inch backset: the G1RLE238 in entry and the G1RLP238 in passage/privacy. Entry function is the keyed-side latch; passage/privacy covers doors that do not take a key cylinder, such as restrooms and interior corridors. Standardizing on the pair at a single backset lets one part number cover the keyed openings and one cover the rest.

No, they solve different problems. The YSSL10 is a security sidelite auxiliary latch with an ADA compliant thumbturn, sized for 1-3/4 inch doors and carrying a fire rating. It is a self-contained auxiliary latching device intended for a sidelite or narrow adjacent panel, operated by its own thumbturn. The Schlage 47273618 is a replacement deadlatch that installs in the door edge and is driven by the lock trim already on the door. If your opening is a glass front with a fixed sidelite that needs its own secured panel, the YSSL10 is the right family; if you are replacing the latch inside an existing ALX lockset, it is not.

The Schlage 47273618 is a replacement part that works with the lock trim already on the door, so it addresses the latch only. To change out the complete assembly, the Lockey M230 is a mechanical keyless digital combination deadlocking spring latch lock with an adjustable backset, fitting doors from 1-1/8 inch to 2 inch thick. It operates on a combination rather than a key, which suits an opening where you are trying to get out of rekeying and key control altogether. The Deltana G1RLE275 and G1RLE238 entry latches and the Dexter C1000 series deadlatch are latch components like the Schlage part, not complete locksets.

Both are deadlatches, but each is matched to its own lock family. The Dexter part is a deadlatch built for C1000 series locksets, and the Schlage 47273618 is an ALX series deadlatch driven by ALX lock trim, with a 1 inch by 2-1/4 inch square corner faceplate at 2-3/4 inch backset and a square cam. The cam shape and the retractor geometry are what tie a latch to its chassis, so a deadlatch from another lock family is not a drop-in even when the backset matches. Measure the existing faceplate cutout in the door edge before you order either way, since square corner and radius corner faceplates are not interchangeable without recutting the mortise.