Weslock 12820X Drive In Deadbolt Latch for 300 Series

The 12820X is the replacement deadbolt latch unit for Weslock 300 Series deadbolts. Drive-in means it has no rectangular faceplate and no faceplate screws: the latch body seats into a plain round 1-inch edge bore and is tapped straight in, so there is no mortising of the door edge. If the door edge you are working with is already mortised for a square or round-corner faceplate, a drive-in latch will sit in that pocket without covering it, and you want a faceplate-style latch instead.

On a Weslock 300 Series deadbolt, the bolt assembly is a separate serviceable part, the 12820X. If the cylinder keys fine and the thumbturn rotates but the bolt binds, drags, or will not fully retract, replacing the latch alone restores it and leaves your existing keying, cylinder, and outside trim in place. That matters on a multi-unit property where the doors are keyed alike: swapping the full deadbolt would force a re-key, swapping the latch does not.

The Deltana DLE23875 drive-in latch covers a door thickness range of 1-3/8 inch to 2 inch, so it takes in thicker doors than a standard residential slab. It is an entry-function latch, meaning it is built to work with a keyed lockset rather than a passage set. Confirm the bore and backset in the door match before ordering, since a drive-in latch seats into the existing 1-inch cross bore without a faceplate mortise.

The Deltana DLP23875 is a drive-in latch with an adjustable backset of 2-3/8 inch or 2-3/4 inch, which lets one part cover both of the common residential backsets. It is a passage/privacy function latch, so it pairs with a non-keyed knob or lever set. For a keyed opening, the Deltana DLE23875 is the entry-function drive-in latch in the same family, with a 1-3/8 inch to 2 inch door thickness range.

For a fire-rated opening, the Kwikset 84290 square corner plainlatch is a UL latch on a 2-3/8 inch backset, and the Kwikset 83521 RCAL plain latch carries a UL 3 hour rating and fits Kwikset BBL, KNL, CNL and PLL lock lines. The Kwikset 83518 RCAL adjustable square drive latch is also UL 3 hour rated. Fire ratings follow the tested lockset and latch combination, so match the latch to the lock line it was listed with rather than mixing brands in a rated opening.

The Weslock 12820X is a mechanical drive-in deadbolt latch for the Weslock 300 series, offered in Oil Rubbed Dark Bronze, Satin Brass, Satin Chrome and Satin Nickel. The Emtek LC9-DBLTCH is a motorized deadbolt latch in the EMPowered series, meaning it is driven by the electronic lock body rather than by a thumbturn and cylinder alone. They are not interchangeable: the motorized latch is matched to its own electronic deadbolt, and the 12820X replaces the mechanical latch inside a 300 series deadbolt.

A drive-in latch like the Weslock 12820X seats into the bore without a mortised faceplate, so it will not fill a square corner faceplate mortise already cut into the door edge. The Kwikset 84290 square corner plainlatch on a 2-3/8 inch backset matches a square corner prep, and the Kwikset 83518 adjustable square drive latch handles a square prep where the backset needs to adjust. Measure the existing mortise before choosing, since square and radius corner prep are not interchangeable without patching the edge.

No. The 12820X is a fixed service latch for the Weslock 300 Series, so it goes back at the backset the door was originally bored for. If you need a latch that covers both of the common residential backsets on one part number, the Deltana DLP23875 is adjustable between 2-3/8 and 2-3/4 inches, and the Kwikset 83518 is an adjustable drive-in as well. For a straight repair of an existing Weslock deadbolt, the fixed part is the correct one because the hole in the door is already set.

No. A deadbolt latch has a square or flat drive that a thumbturn and cylinder rotate, with no spring return and no beveled slope, so it will not work behind a knob or lever. For a passage or privacy bore you want a latch built for that function, such as the Deltana DLP23875 passage/privacy drive-in latch. For an entry knobset, the Deltana DLE23875 is the entry-function drive-in latch. Match the latch function to what is driving it or the handle will turn against a bolt that never moves.

No. The Emtek 83228 is a faceplate and screws for a tubular pocket door privacy latch with square corners, a privacy/bed/bath function part. It is trim and fasteners for a sliding pocket door, not a bolt mechanism, so it will not throw a deadbolt or fit a swinging door cross bore. For a deadbolt bolt assembly in a swinging door, stay with a drive-in deadbolt latch such as the Weslock 12820X for the 300 series.

No single latch covers both functions. The Deltana DLE23875 drive-in latch is entry function for keyed doors, and the Deltana DLP23875 drive-in latch is passage/privacy function for interior doors, both with a 1-3/8 inch to 2 inch door thickness range. Stocking that pair gives one door thickness range and one drive-in installation method across the building while keeping the correct function on each opening. On Weslock 300 series deadbolts, the matching drive-in deadbolt latch is the 12820X.

The 12820X is mechanical only, driven by the key cylinder and thumbturn on the Weslock 300 Series deadbolt. If the goal is access control or remote operation, the Emtek LC9-DBLTCH EMPowered motorized deadbolt latch is the powered part in the same category. That is a different platform entirely, not a drop-in for a Weslock 300 Series, so it means changing the deadbolt rather than servicing the one on the door.